diff --git a/platformapi/baidunavi/baidunavi_test.go b/platformapi/baidunavi/baidunavi_test.go
index d5945da7..ac6040ee 100644
--- a/platformapi/baidunavi/baidunavi_test.go
+++ b/platformapi/baidunavi/baidunavi_test.go
@@ -2,6 +2,7 @@ package baidunavi
 
 import (
 	"fmt"
+	"math"
 	"testing"
 
 	"git.rosy.net.cn/baseapi"
@@ -1354,15 +1355,25 @@ var cc []string = []string{
 }
 
 func TestBatchCoordinateConvertBai2Gao(t *testing.T) {
-
-	result, err := api.BatchCoordinateConvertBai2Gao(cc, "5")
+	fmt.Println(len(cc))
+	result, err := api.BatchCoordinateConvertBai2Gao(cc[0:100], "5")
 	fmt.Println(err)
 	fmt.Println(result)
 }
 
+// 1290 104.00734814129,30.660267081943
 func TestName(t *testing.T) {
-	syncStatus := 1
-	syncStatus |= 32
-	fmt.Println(syncStatus)
+	var bd_lng = 104.00734814129
+	var bd_lat = 30.660267081943
+	var XPI = math.Pi * 3000.0 / 180.0
+	var x = bd_lng - 0.0065
+	var y = bd_lat - 0.006
 
+	var z = math.Sqrt(x*x+y*y) - 0.00002*math.Sin(y*XPI)
+	var theta = math.Atan2(y, x) - 0.000003*math.Cos(x*XPI)
+	var gg_lng = z * math.Cos(theta)
+	var gg_lat = z * math.Sin(theta)
+
+	fmt.Println(gg_lng)
+	fmt.Println(gg_lat)
 }