diff --git a/example/GetCode/main.go b/example/GetCode/main.go
index 591de8c..02f8e3e 100644
--- a/example/GetCode/main.go
+++ b/example/GetCode/main.go
@@ -3,20 +3,18 @@ package main
 import (
 	"github.com/injoyai/logs"
 	"github.com/injoyai/tdx"
+	"github.com/injoyai/tdx/example/common"
 	"github.com/injoyai/tdx/protocol"
 )
 
 func main() {
-	c, err := tdx.Dial("124.71.187.122:7709")
-	logs.PanicErr(err)
+	common.Test(func(c *tdx.Client) {
+		resp, err := c.GetCode(protocol.ExchangeSH, 369)
+		logs.PanicErr(err)
 
-	resp, err := c.GetCode(protocol.ExchangeSH, 369)
-	logs.PanicErr(err)
-
-	for i, v := range resp.List {
-		logs.Debug(i, v)
-	}
-	logs.Debug("总数:", resp.Count)
-
-	select {}
+		for i, v := range resp.List {
+			logs.Debug(i, v, v.LastPrice)
+		}
+		logs.Debug("总数:", resp.Count)
+	})
 }
diff --git a/protocol/model_code.go b/protocol/model_code.go
index 3c7c8ee..cfffd8e 100644
--- a/protocol/model_code.go
+++ b/protocol/model_code.go
@@ -49,7 +49,7 @@ func (code) Decode(bs []byte) (*CodeResp, error) {
 			Multiple:  Uint16(bs[6:8]),
 			Name:      string(UTF8ToGBK(bs[8:16])),
 			Decimal:   int8(bs[20]),
-			LastPrice: getVolume(Uint32(bs[21:25])),
+			LastPrice: getVolume2(Uint32(bs[21:25])),
 		}
 		//logs.Debug(bs[25:29]) //26和28字节 好像是枚举(基本是44,45和34,35)
 		bs = bs[29:]
diff --git a/protocol/model_kline_test.go b/protocol/model_kline_test.go
index 6dfc820..9cd8be2 100644
--- a/protocol/model_kline_test.go
+++ b/protocol/model_kline_test.go
@@ -19,7 +19,10 @@ func Test_stockKline_Decode(t *testing.T) {
 		t.Error(err)
 		return
 	}
-	resp, err := MKline.Decode(bs, 9)
+	resp, err := MKline.Decode(bs, KlineCache{
+		Type: 9,
+		Kind: "",
+	})
 	if err != nil {
 		t.Error(err)
 		return
diff --git a/protocol/unit.go b/protocol/unit.go
index cb42e4e..9ed9a5b 100644
--- a/protocol/unit.go
+++ b/protocol/unit.go
@@ -195,6 +195,46 @@ func getVolume(val uint32) (volume float64) {
 	return
 }
 
+func getVolume2(val uint32) float64 {
+	ivol := int32(val)
+	logpoint := ivol >> 24       // 提取最高字节（原8*3移位）
+	hleax := (ivol >> 16) & 0xff // 提取次高字节
+	lheax := (ivol >> 8) & 0xff  // 提取第三字节
+	lleax := ivol & 0xff         // 提取最低字节
+
+	dwEcx := logpoint*2 - 0x7f            // 基础指数计算
+	dbl_xmm6 := math.Exp2(float64(dwEcx)) // 核心指数计算仅一次
+
+	// 计算dbl_xmm4
+	var dbl_xmm4 float64
+	if hleax > 0x80 {
+		// 高位分支：合并指数计算
+		dbl_xmm4 = dbl_xmm6 * (64.0 + float64(hleax&0x7f)) / 64.0
+	} else {
+		// 低位分支：复用核心指数
+		dbl_xmm4 = dbl_xmm6 * float64(hleax) / 128.0
+	}
+
+	// 计算缩放因子
+	scale := 1.0
+	if (hleax & 0x80) != 0 {
+		scale = 2.0
+	}
+
+	// 预计算常量的倒数，优化除法
+	const (
+		inv32768   = 1.0 / 32768.0   // 2^15
+		inv8388608 = 1.0 / 8388608.0 // 2^23
+	)
+
+	// 计算低位分量
+	dbl_xmm3 := dbl_xmm6 * float64(lheax) * inv32768 * scale
+	dbl_xmm1 := dbl_xmm6 * float64(lleax) * inv8388608 * scale
+
+	// 合计最终结果
+	return dbl_xmm6 + dbl_xmm4 + dbl_xmm3 + dbl_xmm1
+}
+
 // IsStock 是否是股票,示例sz000001
 func IsStock(code string) bool {
 	if len(code) != 8 {
diff --git a/protocol/unit_test.go b/protocol/unit_test.go
index 8157556..c0169a4 100644
--- a/protocol/unit_test.go
+++ b/protocol/unit_test.go
@@ -20,5 +20,6 @@ func TestUTF8ToGBK(t *testing.T) {
 
 func Test_getVolume(t *testing.T) {
 	t.Log(getVolume(1237966432))
-	t.Log(getVolume(1237966432))
+	t.Log(getVolume2(1237966432))
+
 }