diff --git a/g/container/gset/gset.go b/g/container/gset/gset.go
index 106f23a8c..6662caf1e 100644
--- a/g/container/gset/gset.go
+++ b/g/container/gset/gset.go
@@ -18,18 +18,14 @@ type Set struct {
     m  map[interface{}]struct{}
 }
 
-// Create a set, which contains un-repeated items.
-// The param <unsafe> used to specify whether using array with un-concurrent-safety,
-// which is false in default, means concurrent-safe in default.
-//
-// 创建一个空的集合对象，参数unsafe用于指定是否用于非并发安全场景，默认为false，表示并发安全。
+// New create and returns a new set, which contains un-repeated items.
+// The param <unsafe> used to specify whether using set in un-concurrent-safety,
+// which is false in default.
 func New(unsafe...bool) *Set {
     return NewSet(unsafe...)
 }
 
 // See New.
-//
-// 同New.
 func NewSet(unsafe...bool) *Set {
     return &Set{
         m  : make(map[interface{}]struct{}),
@@ -37,10 +33,8 @@ func NewSet(unsafe...bool) *Set {
     }
 }
 
-// Iterate the set by given callback <f>,
+// Iterator iterates the set with given callback function <f>,
 // if <f> returns true then continue iterating; or false to stop.
-//
-// 给定回调函数对原始内容进行遍历，回调函数返回true表示继续遍历，否则停止遍历。
 func (set *Set) Iterator(f func (v interface{}) bool) *Set {
     set.mu.RLock()
     defer set.mu.RUnlock()
@@ -52,9 +46,7 @@ func (set *Set) Iterator(f func (v interface{}) bool) *Set {
     return set
 }
 
-// Add one or multiple items to the set.
-//
-// 添加元素项到集合中(支持多个).
+// Add adds one or multiple items to the set.
 func (set *Set) Add(item...interface{}) *Set {
     set.mu.Lock()
     for _, v := range item {
@@ -64,9 +56,7 @@ func (set *Set) Add(item...interface{}) *Set {
     return set
 }
 
-// Check whether the set contains <item>.
-//
-// 键是否存在.
+// Contains checks whether the set contains <item>.
 func (set *Set) Contains(item interface{}) bool {
     set.mu.RLock()
     _, exists := set.m[item]
@@ -74,9 +64,7 @@ func (set *Set) Contains(item interface{}) bool {
     return exists
 }
 
-// Remove <item> from set.
-//
-// 删除元素项。
+// Remove deletes <item> from set.
 func (set *Set) Remove(item interface{}) *Set {
     set.mu.Lock()
     delete(set.m, item)
@@ -84,9 +72,7 @@ func (set *Set) Remove(item interface{}) *Set {
     return set
 }
 
-// Get size of the set.
-//
-// 获得集合大小。
+// Size returns the size of the set.
 func (set *Set) Size() int {
     set.mu.RLock()
     l := len(set.m)
@@ -94,9 +80,7 @@ func (set *Set) Size() int {
     return l
 }
 
-// Clear the set.
-//
-// 清空集合。
+// Clear deletes all items of the set.
 func (set *Set) Clear() *Set {
     set.mu.Lock()
     set.m = make(map[interface{}]struct{})
@@ -104,9 +88,7 @@ func (set *Set) Clear() *Set {
     return set
 }
 
-// Get the copy of items from set as slice.
-//
-// 获得集合元素项列表.
+// Slice returns the a of items of the set as slice.
 func (set *Set) Slice() []interface{} {
     set.mu.RLock()
     i   := 0
@@ -119,23 +101,17 @@ func (set *Set) Slice() []interface{} {
     return ret
 }
 
-// Join set items with a string.
-//
-// 使用glue字符串串连当前集合的元素项，构造成新的字符串返回。
+// Join joins items with a string <glue>.
 func (set *Set) Join(glue string) string {
     return strings.Join(gconv.Strings(set.Slice()), ",")
 }
 
-// Return set items as a string, which are joined by char ','.
-//
-// 使用glue字符串串连当前集合的元素项，构造成新的字符串返回。
+// String returns items as a string, which are joined by char ','.
 func (set *Set) String() string {
     return set.Join(",")
 }
 
-// Lock writing by callback function f.
-//
-// 使用自定义方法执行加锁修改操作。
+// LockFunc locks writing with callback function <f>.
 func (set *Set) LockFunc(f func(m map[interface{}]struct{})) *Set {
     set.mu.Lock()
     defer set.mu.Unlock()
@@ -143,9 +119,7 @@ func (set *Set) LockFunc(f func(m map[interface{}]struct{})) *Set {
     return set
 }
 
-// Lock reading by callback function f.
-//
-// 使用自定义方法执行加锁读取操作。
+// RLockFunc locks reading with callback function <f>.
 func (set *Set) RLockFunc(f func(m map[interface{}]struct{})) *Set {
     set.mu.RLock()
     defer set.mu.RUnlock()
@@ -153,9 +127,7 @@ func (set *Set) RLockFunc(f func(m map[interface{}]struct{})) *Set {
     return set
 }
 
-// Check whether the two sets equal.
-//
-// 判断两个集合是否相等.
+// Equal checks whether the two sets equal.
 func (set *Set) Equal(other *Set) bool {
     if set == other {
         return true
@@ -175,9 +147,7 @@ func (set *Set) Equal(other *Set) bool {
     return true
 }
 
-// Check whether the current set is sub-set of <other>.
-//
-// 判断当前集合是否为other集合的子集.
+// IsSubsetOf checks whether the current set is a sub-set of <other>.
 func (set *Set) IsSubsetOf(other *Set) bool {
     if set == other {
         return true
@@ -194,10 +164,8 @@ func (set *Set) IsSubsetOf(other *Set) bool {
     return true
 }
 
-// Returns a new set which is the union of <set> and <other>.
-// Which means, all the items in <newSet> is in <set> or in <other>.
-//
-// 并集, 返回新的集合：属于set或属于others的元素为元素的集合.
+// Union returns a new set which is the union of <set> and <others>.
+// Which means, all the items in <newSet> are in <set> or in <others>.
 func (set *Set) Union(others ... *Set) (newSet *Set) {
     newSet = NewSet(true)
     set.mu.RLock()
@@ -222,10 +190,8 @@ func (set *Set) Union(others ... *Set) (newSet *Set) {
     return
 }
 
-// Returns a new set which is the difference set from <set> to <other>.
-// Which means, all the items in <newSet> is in <set> and not in <other>.
-//
-// 差集, 返回新的集合: 属于set且不属于others的元素为元素的集合.
+// Diff returns a new set which is the difference set from <set> to <others>.
+// Which means, all the items in <newSet> are in <set> but not in <others>.
 func (set *Set) Diff(others...*Set) (newSet *Set) {
     newSet = NewSet(true)
     set.mu.RLock()
@@ -245,10 +211,8 @@ func (set *Set) Diff(others...*Set) (newSet *Set) {
     return
 }
 
-// Returns a new set which is the intersection from <set> to <other>.
-// Which means, all the items in <newSet> is in <set> and also in <other>.
-//
-// 交集, 返回新的集合: 属于set且属于others的元素为元素的集合.
+// Intersect returns a new set which is the intersection from <set> to <others>.
+// Which means, all the items in <newSet> are in <set> and also in <others>.
 func (set *Set) Intersect(others...*Set) (newSet *Set) {
     newSet = NewSet(true)
     set.mu.RLock()
@@ -269,11 +233,11 @@ func (set *Set) Intersect(others...*Set) (newSet *Set) {
     return
 }
 
-// Returns a new set which is the complement from <set> to <full>.
-// Which means, all the items in <newSet> is in <full> and not in <set>.
+// Complement returns a new set which is the complement from <set> to <full>.
+// Which means, all the items in <newSet> are in <full> and not in <set>.
 //
-// 补集, 返回新的集合: (前提: set应当为full的子集)属于全集full不属于集合set的元素组成的集合.
-// 如果给定的full集合不是set的全集时，返回full与set的差集.
+// It returns the difference between <full> and <set>
+// if the given set <full> is not the full set of <set>.
 func (set *Set) Complement(full *Set) (newSet *Set) {
     newSet = NewSet(true)
     set.mu.RLock()
@@ -288,4 +252,34 @@ func (set *Set) Complement(full *Set) (newSet *Set) {
         }
     }
     return
+}
+
+// Merge adds items from <others> sets into <set>.
+func (set *Set) Merge(others ... *Set) *Set {
+	set.mu.Lock()
+	defer set.mu.Unlock()
+	for _, other := range others {
+		if set != other {
+			other.mu.RLock()
+		}
+		for k, v := range other.m {
+			set.m[k] = v
+		}
+		if set != other {
+			other.mu.RUnlock()
+		}
+	}
+	return set
+}
+
+// Sum sums items.
+// Note: The items should be converted to int type,
+// or you'd get a result that you unexpected.
+func (set *Set) Sum() (sum int) {
+	set.mu.RLock()
+	defer set.mu.RUnlock()
+	for k, _ := range set.m {
+		sum += gconv.Int(k)
+	}
+	return
 }
\ No newline at end of file
diff --git a/g/container/gset/gset_int_set.go b/g/container/gset/gset_int_set.go
index a53a90692..4c35a2619 100644
--- a/g/container/gset/gset_int_set.go
+++ b/g/container/gset/gset_int_set.go
@@ -18,11 +18,9 @@ type IntSet struct {
 	m  map[int]struct{}
 }
 
-// Create a set, which contains un-repeated items.
-// The param <unsafe> used to specify whether using array with un-concurrent-safety,
-// which is false in default, means concurrent-safe in default.
-//
-// 创建一个空的集合对象，参数unsafe用于指定是否用于非并发安全场景，默认为false，表示并发安全。
+// New create and returns a new set, which contains un-repeated items.
+// The param <unsafe> used to specify whether using set in un-concurrent-safety,
+// which is false in default.
 func NewIntSet(unsafe...bool) *IntSet {
 	return &IntSet{
 		m  : make(map[int]struct{}),
@@ -30,10 +28,8 @@ func NewIntSet(unsafe...bool) *IntSet {
 	}
 }
 
-// Iterate the set by given callback <f>,
+// Iterator iterates the set with given callback function <f>,
 // if <f> returns true then continue iterating; or false to stop.
-//
-// 给定回调函数对原始内容进行遍历，回调函数返回true表示继续遍历，否则停止遍历。
 func (set *IntSet) Iterator(f func (v int) bool) *IntSet {
     set.mu.RLock()
     defer set.mu.RUnlock()
@@ -45,9 +41,7 @@ func (set *IntSet) Iterator(f func (v int) bool) *IntSet {
     return set
 }
 
-// Add one or multiple items to the set.
-//
-// 添加元素项到集合中(支持多个).
+// Add adds one or multiple items to the set.
 func (set *IntSet) Add(item...int) *IntSet {
 	set.mu.Lock()
     for _, v := range item {
@@ -57,9 +51,7 @@ func (set *IntSet) Add(item...int) *IntSet {
 	return set
 }
 
-// Check whether the set contains <item>.
-//
-// 键是否存在.
+// Contains checks whether the set contains <item>.
 func (set *IntSet) Contains(item int) bool {
 	set.mu.RLock()
 	_, exists := set.m[item]
@@ -67,9 +59,7 @@ func (set *IntSet) Contains(item int) bool {
 	return exists
 }
 
-// Remove <item> from set.
-//
-// 删除元素项。
+// Remove deletes <item> from set.
 func (set *IntSet) Remove(item int) *IntSet {
 	set.mu.Lock()
 	delete(set.m, item)
@@ -77,9 +67,7 @@ func (set *IntSet) Remove(item int) *IntSet {
 	return set
 }
 
-// Get size of the set.
-//
-// 获得集合大小。
+// Size returns the size of the set.
 func (set *IntSet) Size() int {
 	set.mu.RLock()
 	l := len(set.m)
@@ -87,9 +75,7 @@ func (set *IntSet) Size() int {
 	return l
 }
 
-// Clear the set.
-//
-// 清空集合。
+// Clear deletes all items of the set.
 func (set *IntSet) Clear() *IntSet {
 	set.mu.Lock()
 	set.m = make(map[int]struct{})
@@ -97,9 +83,7 @@ func (set *IntSet) Clear() *IntSet {
     return set
 }
 
-// Get the copy of items from set as slice.
-//
-// 获得集合元素项列表.
+// Slice returns the a of items of the set as slice.
 func (set *IntSet) Slice() []int {
 	set.mu.RLock()
 	ret := make([]int, len(set.m))
@@ -112,23 +96,17 @@ func (set *IntSet) Slice() []int {
 	return ret
 }
 
-// Join set items with a string.
-//
-// 使用glue字符串串连当前集合的元素项，构造成新的字符串返回。
+// Join joins items with a string <glue>.
 func (set *IntSet) Join(glue string) string {
     return strings.Join(gconv.Strings(set.Slice()), ",")
 }
 
-// Return set items as a string, which are joined by char ','.
-//
-// 使用glue字符串串连当前集合的元素项，构造成新的字符串返回。
+// String returns items as a string, which are joined by char ','.
 func (set *IntSet) String() string {
     return set.Join(",")
 }
 
-// Lock writing by callback function f.
-//
-// 使用自定义方法执行加锁修改操作。
+// LockFunc locks writing with callback function <f>.
 func (set *IntSet) LockFunc(f func(m map[int]struct{})) *IntSet {
 	set.mu.Lock()
 	defer set.mu.Unlock()
@@ -136,9 +114,7 @@ func (set *IntSet) LockFunc(f func(m map[int]struct{})) *IntSet {
     return set
 }
 
-// Lock reading by callback function f.
-//
-// 使用自定义方法执行加锁读取操作。
+// RLockFunc locks reading with callback function <f>.
 func (set *IntSet) RLockFunc(f func(m map[int]struct{})) *IntSet {
     set.mu.RLock()
     defer set.mu.RUnlock()
@@ -146,9 +122,7 @@ func (set *IntSet) RLockFunc(f func(m map[int]struct{})) *IntSet {
     return set
 }
 
-// Check whether the two sets equal.
-//
-// 判断两个集合是否相等.
+// Equal checks whether the two sets equal.
 func (set *IntSet) Equal(other *IntSet) bool {
     if set == other {
         return true
@@ -168,9 +142,7 @@ func (set *IntSet) Equal(other *IntSet) bool {
 	return true
 }
 
-// Check whether the current set is sub-set of <other>.
-//
-// 判断当前集合是否为other集合的子集.
+// IsSubsetOf checks whether the current set is a sub-set of <other>.
 func (set *IntSet) IsSubsetOf(other *IntSet) bool {
     if set == other {
         return true
@@ -187,10 +159,8 @@ func (set *IntSet) IsSubsetOf(other *IntSet) bool {
     return true
 }
 
-// Returns a new set which is the union of <set> and <other>.
-// Which means, all the items in <newSet> is in <set> or in <other>.
-//
-// 并集, 返回新的集合：属于set或属于others的元素为元素的集合.
+// Union returns a new set which is the union of <set> and <other>.
+// Which means, all the items in <newSet> are in <set> or in <other>.
 func (set *IntSet) Union(others ... *IntSet) (newSet *IntSet) {
     newSet = NewIntSet(true)
     set.mu.RLock()
@@ -215,10 +185,8 @@ func (set *IntSet) Union(others ... *IntSet) (newSet *IntSet) {
     return
 }
 
-// Returns a new set which is the difference set from <set> to <other>.
-// Which means, all the items in <newSet> is in <set> and not in <other>.
-//
-// 差集, 返回新的集合: 属于set且不属于others的元素为元素的集合.
+// Diff returns a new set which is the difference set from <set> to <other>.
+// Which means, all the items in <newSet> are in <set> but not in <other>.
 func (set *IntSet) Diff(others...*IntSet) (newSet *IntSet) {
     newSet = NewIntSet(true)
     set.mu.RLock()
@@ -238,10 +206,8 @@ func (set *IntSet) Diff(others...*IntSet) (newSet *IntSet) {
     return
 }
 
-// Returns a new set which is the intersection from <set> to <other>.
-// Which means, all the items in <newSet> is in <set> and also in <other>.
-//
-// 交集, 返回新的集合: 属于set且属于others的元素为元素的集合.
+// Intersect returns a new set which is the intersection from <set> to <other>.
+// Which means, all the items in <newSet> are in <set> and also in <other>.
 func (set *IntSet) Intersect(others...*IntSet) (newSet *IntSet) {
     newSet = NewIntSet(true)
     set.mu.RLock()
@@ -262,11 +228,11 @@ func (set *IntSet) Intersect(others...*IntSet) (newSet *IntSet) {
     return
 }
 
-// Returns a new set which is the complement from <set> to <full>.
-// Which means, all the items in <newSet> is in <full> and not in <set>.
+// Complement returns a new set which is the complement from <set> to <full>.
+// Which means, all the items in <newSet> are in <full> and not in <set>.
 //
-// 补集, 返回新的集合: (前提: set应当为full的子集)属于全集full不属于集合set的元素组成的集合.
-// 如果给定的full集合不是set的全集时，返回full与set的差集.
+// It returns the difference between <full> and <set>
+// if the given set <full> is not the full set of <set>.
 func (set *IntSet) Complement(full *IntSet) (newSet *IntSet) {
     newSet = NewIntSet(true)
     set.mu.RLock()
@@ -282,3 +248,33 @@ func (set *IntSet) Complement(full *IntSet) (newSet *IntSet) {
     }
     return
 }
+
+// Merge adds items from <others> sets into <set>.
+func (set *IntSet) Merge(others ... *IntSet) *IntSet {
+	set.mu.Lock()
+	defer set.mu.Unlock()
+	for _, other := range others {
+		if set != other {
+			other.mu.RLock()
+		}
+		for k, v := range other.m {
+			set.m[k] = v
+		}
+		if set != other {
+			other.mu.RUnlock()
+		}
+	}
+	return set
+}
+
+// Sum sums items.
+// Note: The items should be converted to int type,
+// or you'd get a result that you unexpected.
+func (set *IntSet) Sum() (sum int) {
+	set.mu.RLock()
+	defer set.mu.RUnlock()
+	for k, _ := range set.m {
+		sum += k
+	}
+	return
+}
\ No newline at end of file
diff --git a/g/container/gset/gset_string_set.go b/g/container/gset/gset_string_set.go
index 39faeb2fb..3b77d3b30 100644
--- a/g/container/gset/gset_string_set.go
+++ b/g/container/gset/gset_string_set.go
@@ -9,7 +9,8 @@ package gset
 
 import (
     "github.com/gogf/gf/g/internal/rwmutex"
-    "strings"
+	"github.com/gogf/gf/g/util/gconv"
+	"strings"
 )
 
 type StringSet struct {
@@ -17,11 +18,9 @@ type StringSet struct {
 	m  map[string]struct{}
 }
 
-// Create a set, which contains un-repeated items.
-// The param <unsafe> used to specify whether using array with un-concurrent-safety,
-// which is false in default, means concurrent-safe in default.
-//
-// 创建一个空的集合对象，参数unsafe用于指定是否用于非并发安全场景，默认为false，表示并发安全。
+// New create and returns a new set, which contains un-repeated items.
+// The param <unsafe> used to specify whether using set in un-concurrent-safety,
+// which is false in default.
 func NewStringSet(unsafe...bool) *StringSet {
 	return &StringSet {
 		m  : make(map[string]struct{}),
@@ -29,10 +28,8 @@ func NewStringSet(unsafe...bool) *StringSet {
 	}
 }
 
-// Iterate the set by given callback <f>,
+// Iterator iterates the set with given callback function <f>,
 // if <f> returns true then continue iterating; or false to stop.
-//
-// 给定回调函数对原始内容进行遍历，回调函数返回true表示继续遍历，否则停止遍历。
 func (set *StringSet) Iterator(f func (v string) bool) *StringSet {
     set.mu.RLock()
     defer set.mu.RUnlock()
@@ -44,9 +41,7 @@ func (set *StringSet) Iterator(f func (v string) bool) *StringSet {
 	return set
 }
 
-// Add one or multiple items to the set.
-//
-// 添加元素项到集合中(支持多个).
+// Add adds one or multiple items to the set.
 func (set *StringSet) Add(item...string) *StringSet {
 	set.mu.Lock()
 	for _, v := range item {
@@ -56,9 +51,7 @@ func (set *StringSet) Add(item...string) *StringSet {
 	return set
 }
 
-// Check whether the set contains <item>.
-//
-// 键是否存在.
+// Contains checks whether the set contains <item>.
 func (set *StringSet) Contains(item string) bool {
 	set.mu.RLock()
 	_, exists := set.m[item]
@@ -66,9 +59,7 @@ func (set *StringSet) Contains(item string) bool {
 	return exists
 }
 
-// Remove <item> from set.
-//
-// 删除元素项。
+// Remove deletes <item> from set.
 func (set *StringSet) Remove(item string) *StringSet {
 	set.mu.Lock()
 	delete(set.m, item)
@@ -76,9 +67,7 @@ func (set *StringSet) Remove(item string) *StringSet {
     return set
 }
 
-// Get size of the set.
-//
-// 获得集合大小。
+// Size returns the size of the set.
 func (set *StringSet) Size() int {
 	set.mu.RLock()
 	l := len(set.m)
@@ -86,9 +75,7 @@ func (set *StringSet) Size() int {
 	return l
 }
 
-// Clear the set.
-//
-// 清空集合。
+// Clear deletes all items of the set.
 func (set *StringSet) Clear() *StringSet {
 	set.mu.Lock()
 	set.m = make(map[string]struct{})
@@ -96,9 +83,7 @@ func (set *StringSet) Clear() *StringSet {
     return set
 }
 
-// Get the copy of items from set as slice.
-//
-// 获得集合元素项列表.
+// Slice returns the a of items of the set as slice.
 func (set *StringSet) Slice() []string {
 	set.mu.RLock()
 	ret := make([]string, len(set.m))
@@ -112,23 +97,17 @@ func (set *StringSet) Slice() []string {
 	return ret
 }
 
-// Join set items with a string.
-//
-// 使用glue字符串串连当前集合的元素项，构造成新的字符串返回。
+// Join joins items with a string <glue>.
 func (set *StringSet) Join(glue string) string {
     return strings.Join(set.Slice(), ",")
 }
 
-// Return set items as a string, which are joined by char ','.
-//
-// 使用glue字符串串连当前集合的元素项，构造成新的字符串返回。
+// String returns items as a string, which are joined by char ','.
 func (set *StringSet) String() string {
     return set.Join(",")
 }
 
-// Lock writing by callback function f.
-//
-// 使用自定义方法执行加锁修改操作。
+// LockFunc locks writing with callback function <f>.
 func (set *StringSet) LockFunc(f func(m map[string]struct{})) *StringSet {
 	set.mu.Lock()
 	defer set.mu.Unlock()
@@ -136,9 +115,7 @@ func (set *StringSet) LockFunc(f func(m map[string]struct{})) *StringSet {
     return set
 }
 
-// Lock reading by callback function f.
-//
-// 使用自定义方法执行加锁读取操作。
+// RLockFunc locks reading with callback function <f>.
 func (set *StringSet) RLockFunc(f func(m map[string]struct{})) *StringSet {
 	set.mu.RLock()
 	defer set.mu.RUnlock()
@@ -146,9 +123,7 @@ func (set *StringSet) RLockFunc(f func(m map[string]struct{})) *StringSet {
     return set
 }
 
-// Check whether the two sets equal.
-//
-// 判断两个集合是否相等.
+// Equal checks whether the two sets equal.
 func (set *StringSet) Equal(other *StringSet) bool {
 	if set == other {
 		return true
@@ -168,9 +143,7 @@ func (set *StringSet) Equal(other *StringSet) bool {
 	return true
 }
 
-// Check whether the current set is sub-set of <other>.
-//
-// 判断当前集合是否为other集合的子集.
+// IsSubsetOf checks whether the current set is a sub-set of <other>.
 func (set *StringSet) IsSubsetOf(other *StringSet) bool {
 	if set == other {
 		return true
@@ -187,10 +160,8 @@ func (set *StringSet) IsSubsetOf(other *StringSet) bool {
 	return true
 }
 
-// Returns a new set which is the union of <set> and <other>.
-// Which means, all the items in <newSet> is in <set> or in <other>.
-//
-// 并集, 返回新的集合：属于set或属于others的元素为元素的集合.
+// Union returns a new set which is the union of <set> and <other>.
+// Which means, all the items in <newSet> are in <set> or in <other>.
 func (set *StringSet) Union(others ... *StringSet) (newSet *StringSet) {
     newSet = NewStringSet(true)
     set.mu.RLock()
@@ -215,10 +186,8 @@ func (set *StringSet) Union(others ... *StringSet) (newSet *StringSet) {
     return
 }
 
-// Returns a new set which is the difference set from <set> to <other>.
-// Which means, all the items in <newSet> is in <set> and not in <other>.
-//
-// 差集, 返回新的集合: 属于set且不属于others的元素为元素的集合.
+// Diff returns a new set which is the difference set from <set> to <other>.
+// Which means, all the items in <newSet> are in <set> but not in <other>.
 func (set *StringSet) Diff(others...*StringSet) (newSet *StringSet) {
     newSet = NewStringSet(true)
     set.mu.RLock()
@@ -238,10 +207,8 @@ func (set *StringSet) Diff(others...*StringSet) (newSet *StringSet) {
     return
 }
 
-// Returns a new set which is the intersection from <set> to <other>.
-// Which means, all the items in <newSet> is in <set> and also in <other>.
-//
-// 交集, 返回新的集合: 属于set且属于others的元素为元素的集合.
+// Intersect returns a new set which is the intersection from <set> to <other>.
+// Which means, all the items in <newSet> are in <set> and also in <other>.
 func (set *StringSet) Intersect(others...*StringSet) (newSet *StringSet) {
     newSet = NewStringSet(true)
     set.mu.RLock()
@@ -262,11 +229,11 @@ func (set *StringSet) Intersect(others...*StringSet) (newSet *StringSet) {
     return
 }
 
-// Returns a new set which is the complement from <set> to <full>.
-// Which means, all the items in <newSet> is in <full> and not in <set>.
+// Complement returns a new set which is the complement from <set> to <full>.
+// Which means, all the items in <newSet> are in <full> and not in <set>.
 //
-// 补集, 返回新的集合: (前提: set应当为full的子集)属于全集full不属于集合set的元素组成的集合.
-// 如果给定的full集合不是set的全集时，返回full与set的差集.
+// It returns the difference between <full> and <set>
+// if the given set <full> is not the full set of <set>.
 func (set *StringSet) Complement(full *StringSet) (newSet *StringSet) {
     newSet = NewStringSet(true)
     set.mu.RLock()
@@ -282,3 +249,33 @@ func (set *StringSet) Complement(full *StringSet) (newSet *StringSet) {
     }
     return
 }
+
+// Merge adds items from <others> sets into <set>.
+func (set *StringSet) Merge(others ... *StringSet) *StringSet {
+	set.mu.Lock()
+	defer set.mu.Unlock()
+	for _, other := range others {
+		if set != other {
+			other.mu.RLock()
+		}
+		for k, v := range other.m {
+			set.m[k] = v
+		}
+		if set != other {
+			other.mu.RUnlock()
+		}
+	}
+	return set
+}
+
+// Sum sums items.
+// Note: The items should be converted to int type,
+// or you'd get a result that you unexpected.
+func (set *StringSet) Sum() (sum int) {
+	set.mu.RLock()
+	defer set.mu.RUnlock()
+	for k, _ := range set.m {
+		sum += gconv.Int(k)
+	}
+	return
+}
\ No newline at end of file
diff --git a/geg/net/ghttp/server/router/group/group1.go b/geg/net/ghttp/server/router/group/group1.go
index 70c77891f..36af78de2 100644
--- a/geg/net/ghttp/server/router/group/group1.go
+++ b/geg/net/ghttp/server/router/group/group1.go
@@ -61,15 +61,16 @@ func main() {
 	//g.REST("/obj/rest",    obj)
 
 	// 分组路由批量注册
-	s.Group("/api").Bind([]ghttp.GroupItem {
-		{"ALL",  "/handler",     Handler},
-		{"ALL",  "/ctl",         ctl},
-		{"GET",  "/ctl/my-show", ctl, "Show"},
-		{"REST", "/ctl/rest",    ctl},
-		{"ALL",  "/obj",         obj},
-		{"GET",  "/obj/my-show", obj, "Show"},
-		{"REST", "/obj/rest",    obj},
-		{"ALL",  "*",            HookHandler, ghttp.HOOK_BEFORE_SERVE},
+	s.Group("/api").Bind([]ghttp.GroupItem{
+
+		{"ALL", "/handler", Handler},
+		{"ALL", "/ctl", ctl},
+		{"GET", "/ctl/my-show", ctl, "Show"},
+		{"REST", "/ctl/rest", ctl},
+		{"ALL", "/obj", obj},
+		{"GET", "/obj/my-show", obj, "Show"},
+		{"REST", "/obj/rest", obj},
+		{"ALL", "*", HookHandler, ghttp.HOOK_BEFORE_SERVE},
 	})
 
 	s.SetPort(8199)
diff --git a/geg/other/test.go b/geg/other/test.go
index 393068584..40d3908e9 100644
--- a/geg/other/test.go
+++ b/geg/other/test.go
@@ -1,9 +1,52 @@
 package main
 
 import (
+	"github.com/gogf/gf/g/container/gset"
 	"fmt"
-	"github.com/gogf/gf/g/util/gconv"
 )
+
 func main() {
-	fmt.Println(gconv.Map(1))
+	// 创建一个非并发安全的集合对象
+	s := gset.New(true)
+
+	// 添加数据项
+	s.Add(1)
+
+	// 批量添加数据项
+	s.Add([]interface{}{1, 2, 3}...)
+
+	// 集合数据项大小
+	fmt.Println(s.Size())
+
+	// 集合中是否存在指定数据项
+	fmt.Println(s.Contains(2))
+
+	// 返回数据项slice
+	fmt.Println(s.Slice())
+
+	// 删除数据项
+	s.Remove(3)
+
+	// 遍历数据项
+	s.Iterator(func(v interface{}) bool {
+		fmt.Println("Iterator:", v)
+		return true
+	})
+
+	// 将集合转换为字符串
+	fmt.Println(s.String())
+
+	// 并发安全写锁操作
+	s.LockFunc(func(m map[interface{}]struct{}) {
+		m[4] = struct{}{}
+	})
+
+	// 并发安全读锁操作
+	s.RLockFunc(func(m map[interface{}]struct{}) {
+		fmt.Println(m)
+	})
+
+	// 清空集合
+	s.Clear()
+	fmt.Println(s.Size())
 }
\ No newline at end of file