diff --git a/core/mapping/unmarshaler.go b/core/mapping/unmarshaler.go
index e4587cd36..3ce016fc1 100644
--- a/core/mapping/unmarshaler.go
+++ b/core/mapping/unmarshaler.go
@@ -7,6 +7,7 @@ import (
 	"errors"
 	"fmt"
 	"reflect"
+	"slices"
 	"strconv"
 	"strings"
 	"sync"
@@ -15,7 +16,6 @@ import (
 	"github.com/zeromicro/go-zero/core/jsonx"
 	"github.com/zeromicro/go-zero/core/lang"
 	"github.com/zeromicro/go-zero/core/proc"
-	"github.com/zeromicro/go-zero/core/stringx"
 )
 
 const (
@@ -894,7 +894,7 @@ func (u *Unmarshaler) processNamedFieldWithValueFromString(fieldType reflect.Typ
 				valueKind.String())
 		}
 
-		if !stringx.Contains(options, checkValue) {
+		if !slices.Contains(options, checkValue) {
 			return fmt.Errorf(`value "%s" for field %q is not defined in options "%v"`,
 				mapValue, key, options)
 		}
diff --git a/core/mapping/utils.go b/core/mapping/utils.go
index f84167e3f..4995c3634 100644
--- a/core/mapping/utils.go
+++ b/core/mapping/utils.go
@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"math"
 	"reflect"
+	"slices"
 	"strconv"
 	"strings"
 	"sync"
@@ -634,11 +635,11 @@ func validateValueInOptions(val any, options []string) error {
 	if len(options) > 0 {
 		switch v := val.(type) {
 		case string:
-			if !stringx.Contains(options, v) {
+			if !slices.Contains(options, v) {
 				return fmt.Errorf(`error: value %q is not defined in options "%v"`, v, options)
 			}
 		default:
-			if !stringx.Contains(options, Repr(v)) {
+			if !slices.Contains(options, Repr(v)) {
 				return fmt.Errorf(`error: value "%v" is not defined in options "%v"`, val, options)
 			}
 		}
diff --git a/core/stringx/strings.go b/core/stringx/strings.go
index 155c8b3ea..4d09e1b73 100644
--- a/core/stringx/strings.go
+++ b/core/stringx/strings.go
@@ -2,6 +2,7 @@ package stringx
 
 import (
 	"errors"
+	"slices"
 	"unicode"
 
 	"github.com/zeromicro/go-zero/core/lang"
@@ -14,17 +15,6 @@ var (
 	ErrInvalidStopPosition = errors.New("stop position is invalid")
 )
 
-// Contains checks if str is in list.
-func Contains(list []string, str string) bool {
-	for _, each := range list {
-		if each == str {
-			return true
-		}
-	}
-
-	return false
-}
-
 // Filter filters chars from s with given filter function.
 func Filter(s string, filter func(r rune) bool) string {
 	var n int
@@ -123,11 +113,7 @@ func Remove(strings []string, strs ...string) []string {
 // Reverse reverses s.
 func Reverse(s string) string {
 	runes := []rune(s)
-
-	for from, to := 0, len(runes)-1; from < to; from, to = from+1, to-1 {
-		runes[from], runes[to] = runes[to], runes[from]
-	}
-
+	slices.Reverse(runes)
 	return string(runes)
 }
 
diff --git a/core/stringx/strings_test.go b/core/stringx/strings_test.go
index 2caffd3e0..15fadce73 100644
--- a/core/stringx/strings_test.go
+++ b/core/stringx/strings_test.go
@@ -41,28 +41,6 @@ func TestNotEmpty(t *testing.T) {
 	}
 }
 
-func TestContainsString(t *testing.T) {
-	cases := []struct {
-		slice  []string
-		value  string
-		expect bool
-	}{
-		{[]string{"1"}, "1", true},
-		{[]string{"1"}, "2", false},
-		{[]string{"1", "2"}, "1", true},
-		{[]string{"1", "2"}, "3", false},
-		{nil, "3", false},
-		{nil, "", false},
-	}
-
-	for _, each := range cases {
-		t.Run(path.Join(each.slice...), func(t *testing.T) {
-			actual := Contains(each.slice, each.value)
-			assert.Equal(t, each.expect, actual)
-		})
-	}
-}
-
 func TestFilter(t *testing.T) {
 	cases := []struct {
 		input   string