diff --git a/go/cmd/nekoray_core/grpc_ray.go b/go/cmd/nekoray_core/grpc_ray.go
index 9f89ec7..84a66e5 100644
--- a/go/cmd/nekoray_core/grpc_ray.go
+++ b/go/cmd/nekoray_core/grpc_ray.go
@@ -2,6 +2,7 @@ package main
 
 import (
 	"context"
+	"encoding/hex"
 	"encoding/json"
 	"errors"
 	"fmt"
@@ -159,6 +160,46 @@ func (s *server) Test(ctx context.Context, in *gen.TestReq) (out *gen.TestResp,
 			}
 		}
 
+		// UDP Latency
+		var udpLatency string
+		if in.FullUdpLatency {
+			ctx, cancel := context.WithTimeout(context.Background(), time.Second*3)
+			result := make(chan string)
+
+			go func() {
+				var startTime = time.Now()
+				pc, err := core.DialUDP(ctx, i.Core)
+				if err == nil {
+					defer pc.Close()
+					dnsPacket, _ := hex.DecodeString("0000010000010000000000000377777706676f6f676c6503636f6d0000010001")
+					addr := &net.UDPAddr{
+						IP:   net.ParseIP("8.8.8.8"),
+						Port: 53,
+					}
+					_, err = pc.WriteTo(dnsPacket, addr)
+					if err == nil {
+						var buf [1400]byte
+						_, _, err = pc.ReadFrom(buf[:])
+					}
+				}
+				if err == nil {
+					var endTime = time.Now()
+					result <- fmt.Sprint(endTime.Sub(startTime).Abs().Milliseconds(), "ms")
+				} else {
+					result <- "Error"
+				}
+				close(result)
+			}()
+
+			select {
+			case <-ctx.Done():
+				udpLatency = "Timeout"
+			case r := <-result:
+				udpLatency = r
+			}
+			cancel()
+		}
+
 		// 入口 IP
 		var in_ip string
 		if in.FullInOut {
@@ -209,12 +250,13 @@ func (s *server) Test(ctx context.Context, in *gen.TestReq) (out *gen.TestResp,
 		// STUN
 		var stunText string
 		if in.FullNat {
-			timeout := time.NewTimer(time.Second * 5)
-			result := make(chan string, 0)
+			ctx, cancel := context.WithTimeout(context.Background(), time.Second*5)
+			result := make(chan string)
 
 			go func() {
-				pc, err := core.DialUDP(context.TODO(), i.Core)
+				pc, err := core.DialUDP(ctx, i.Core)
 				if err == nil {
+					defer pc.Close()
 					stunClient := stun.NewClientWithConnection(pc)
 					stunClient.SetServerAddr("stun.ekiga.net:3478")
 					nat, host, err, fake := stunClient.Discover()
@@ -236,17 +278,21 @@ func (s *server) Test(ctx context.Context, in *gen.TestReq) (out *gen.TestResp,
 			}()
 
 			select {
-			case <-timeout.C:
+			case <-ctx.Done():
 				stunText = "Timeout"
 			case r := <-result:
 				stunText = r
 			}
+			cancel()
 		}
 
 		fr := make([]string, 0)
 		if latency != "" {
 			fr = append(fr, fmt.Sprintf("Latency: %s", latency))
 		}
+		if udpLatency != "" {
+			fr = append(fr, fmt.Sprintf("UDPLatency: %s", udpLatency))
+		}
 		if speed != "" {
 			fr = append(fr, fmt.Sprintf("Speed: %s", speed))
 		}
diff --git a/go/gen/libcore.pb.go b/go/gen/libcore.pb.go
index 71582a1..fd00b89 100644
--- a/go/gen/libcore.pb.go
+++ b/go/gen/libcore.pb.go
@@ -307,11 +307,12 @@ type TestReq struct {
 	Inbound string         `protobuf:"bytes,4,opt,name=inbound,proto3" json:"inbound,omitempty"`
 	Url     string         `protobuf:"bytes,5,opt,name=url,proto3" json:"url,omitempty"`
 	// FullTest
-	InAddress   string `protobuf:"bytes,7,opt,name=in_address,json=inAddress,proto3" json:"in_address,omitempty"`
-	FullLatency bool   `protobuf:"varint,8,opt,name=full_latency,json=fullLatency,proto3" json:"full_latency,omitempty"`
-	FullSpeed   bool   `protobuf:"varint,9,opt,name=full_speed,json=fullSpeed,proto3" json:"full_speed,omitempty"`
-	FullInOut   bool   `protobuf:"varint,10,opt,name=full_in_out,json=fullInOut,proto3" json:"full_in_out,omitempty"`
-	FullNat     bool   `protobuf:"varint,11,opt,name=full_nat,json=fullNat,proto3" json:"full_nat,omitempty"`
+	InAddress      string `protobuf:"bytes,7,opt,name=in_address,json=inAddress,proto3" json:"in_address,omitempty"`
+	FullLatency    bool   `protobuf:"varint,8,opt,name=full_latency,json=fullLatency,proto3" json:"full_latency,omitempty"`
+	FullSpeed      bool   `protobuf:"varint,9,opt,name=full_speed,json=fullSpeed,proto3" json:"full_speed,omitempty"`
+	FullInOut      bool   `protobuf:"varint,10,opt,name=full_in_out,json=fullInOut,proto3" json:"full_in_out,omitempty"`
+	FullNat        bool   `protobuf:"varint,11,opt,name=full_nat,json=fullNat,proto3" json:"full_nat,omitempty"`
+	FullUdpLatency bool   `protobuf:"varint,12,opt,name=full_udp_latency,json=fullUdpLatency,proto3" json:"full_udp_latency,omitempty"`
 }
 
 func (x *TestReq) Reset() {
@@ -423,6 +424,13 @@ func (x *TestReq) GetFullNat() bool {
 	return false
 }
 
+func (x *TestReq) GetFullUdpLatency() bool {
+	if x != nil {
+		return x.FullUdpLatency
+	}
+	return false
+}
+
 type TestResp struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -790,7 +798,7 @@ var file_libcore_proto_rawDesc = []byte{
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@@ -812,76 +820,78 @@ var file_libcore_proto_rawDesc = []byte{
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 }
 
 var (
diff --git a/go/gen/libcore.proto b/go/gen/libcore.proto
index 59aebe3..5f79031 100644
--- a/go/gen/libcore.proto
+++ b/go/gen/libcore.proto
@@ -48,6 +48,7 @@ message TestReq {
   bool full_speed = 9;
   bool full_in_out = 10;
   bool full_nat = 11;
+  bool full_udp_latency = 12;
 }
 
 message TestResp {
diff --git a/translations/fa_IR.ts b/translations/fa_IR.ts
index b4bd4d7..bc7a561 100644
--- a/translations/fa_IR.ts
+++ b/translations/fa_IR.ts
@@ -1220,14 +1220,6 @@ End: %2</source>
         <source>Input</source>
         <translation>ورودی</translation>
     </message>
-    <message>
-        <source>Please enter the items to be tested, separated by commas
-1. Latency
-2. Download speed
-3. In and Out IP
-4. NAT type</source>
-        <translation type="unfinished"></translation>
-    </message>
     <message>
         <source>[%1] test error: %2</source>
         <translation type="unfinished"></translation>
@@ -1256,6 +1248,15 @@ End: %2</source>
         <source>Current Select</source>
         <translation type="unfinished"></translation>
     </message>
+    <message>
+        <source>Please enter the items to be tested, separated by commas
+1. Latency
+2. Download speed
+3. In and Out IP
+4. UDP NAT type
+5. UDP Latency</source>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>ProxyItem</name>
diff --git a/translations/zh_CN.ts b/translations/zh_CN.ts
index 1447f52..13743aa 100644
--- a/translations/zh_CN.ts
+++ b/translations/zh_CN.ts
@@ -1089,18 +1089,6 @@ End: %2</source>
         <source>Input</source>
         <translation>输入</translation>
     </message>
-    <message>
-        <source>Please enter the items to be tested, separated by commas
-1. Latency
-2. Download speed
-3. In and Out IP
-4. NAT type</source>
-        <translation>请输入要测试的项目，用逗号分隔
-1. 延迟
-2. 下载速度
-3. 入口出口 IP
-4. NAT 类型</translation>
-    </message>
     <message>
         <source>New profile</source>
         <translation>手动输入配置</translation>
@@ -1267,6 +1255,20 @@ Split by line.</source>
         <source>Current Select</source>
         <translation>当前选中</translation>
     </message>
+    <message>
+        <source>Please enter the items to be tested, separated by commas
+1. Latency
+2. Download speed
+3. In and Out IP
+4. UDP NAT type
+5. UDP Latency</source>
+        <translation>请输入要测试的项目，用逗号分隔
+1. TCP 延迟
+2. 下载速度
+3. 入口出口 IP
+4. UDP NAT 类型
+5. UDP DNS 延迟</translation>
+    </message>
 </context>
 <context>
     <name>ProxyItem</name>
diff --git a/ui/mainwindow_grpc.cpp b/ui/mainwindow_grpc.cpp
index 5060626..c0ee6ef 100644
--- a/ui/mainwindow_grpc.cpp
+++ b/ui/mainwindow_grpc.cpp
@@ -56,8 +56,9 @@ void MainWindow::speedtest_current_group(int mode) {
                                           "1. Latency\n"
                                           "2. Download speed\n"
                                           "3. In and Out IP\n"
-                                          "4. NAT type"),
-                                       QLineEdit::Normal, "1,2,3,4", &ok);
+                                          "4. UDP NAT type\n"
+                                          "5. UDP Latency"),
+                                       QLineEdit::Normal, "1,5", &ok);
         full_test_flags = s.trimmed().split(",");
         if (!ok) return;
     }
@@ -115,6 +116,7 @@ void MainWindow::speedtest_current_group(int mode) {
                         req.set_full_speed(full_test_flags.contains("2"));
                         req.set_full_in_out(full_test_flags.contains("3"));
                         req.set_full_nat(full_test_flags.contains("4"));
+                        req.set_full_udp_latency(full_test_flags.contains("5"));
                     } else if (mode == libcore::TcpPing) {
                         req.set_address(profile->bean->DisplayAddress().toStdString());
                     }