diff --git a/cmd/huashijie_work_go/huashijie_work_go.go b/cmd/huashijie_work_go/huashijie_work_go.go
index 25e6997..3aa1c45 100644
--- a/cmd/huashijie_work_go/huashijie_work_go.go
+++ b/cmd/huashijie_work_go/huashijie_work_go.go
@@ -173,7 +173,7 @@ func ShowStatus(t *savewebtracker.Tracker) {
 }
 
 func main() {
-	tracker := savewebtracker.GetTracker(project_id, "0.3", savewebtracker.Archivist())
+	tracker := savewebtracker.GetTracker(project_id, "0.4", savewebtracker.Archivist())
 	tracker.PING_client = GetRetryableHttpClient(10*time.Second, DEBUG)
 	tracker.HTTP_client = GetRetryableHttpClient(10*time.Second, DEBUG)
 	tracker.SelectBestTracker().StartSelectTrackerBackground().StartFetchProjectBackground()
diff --git a/pkg/huashijie_api.go b/pkg/huashijie_api.go
index daca275..ad88823 100644
--- a/pkg/huashijie_api.go
+++ b/pkg/huashijie_api.go
@@ -1,13 +1,14 @@
 package huashijie_api
 
 import (
-	"crypto/md5"
+	"encoding/json"
 	"fmt"
 	"io"
 	"log"
 	"math/rand"
 	"net/http"
 	"os"
+	"strconv"
 	"strings"
 	"time"
 )
@@ -48,10 +49,39 @@ func EnsureConnection(client http.Client) {
 		panic(err)
 	}
 	text := string(body)
-	fmt.Println(text)
+	Logger.Println(text)
 	if !strings.Contains(text, "update_ver_code") {
 		panic("NotImplementedError: " + text)
 	}
+
+	// 125277547
+	body, r_status := GetWorkDetailResponse(client, "125277547")
+
+	if r_status != 200 {
+		Logger.Println("HTTP status code:", r_status, "body:", string(body))
+		panic("HTTP status code: " + strconv.Itoa(r_status))
+	}
+
+	var r_json map[string]interface{}
+
+	if err := json.Unmarshal(body, &r_json); err != nil {
+		Logger.Println("failed to parse JSON:", string(body), "error:", err)
+		panic("failed to parse JSON: " + string(body))
+	}
+
+	// check if 'status' in r_json
+	if status, ok := r_json["status"]; ok {
+		switch status := status.(type) {
+		case float64:
+			if status == 1 {
+				// OK
+				Logger.Println("len(body):", len(body), "->", string(body[:256]), "...OK")
+				return
+			}
+		}
+	}
+	Logger.Println("JSON:", string(body))
+	panic("assertion failed: status == 1")
 }
 
 var cur_fake_user_id = -1
@@ -81,9 +111,9 @@ func GetWorkDetailResponse(client http.Client, work_id string) ([]byte, int) {
 		}
 
 		// fake token = md5(visitorId + "huashijie")
-		md5hash := md5.New()
-		md5hash.Write([]byte(visitorId + "huashijie"))
-		token = fmt.Sprintf("%x", md5hash.Sum(nil))
+		// md5hash := md5.New()
+		// md5hash.Write([]byte(visitorId + "huashijie"))
+		// token = fmt.Sprintf("%x", md5hash.Sum(nil))
 
 		Logger.Println("USERID:", visitorId, "token:", token, "left", time.Until(cur_fake_user_left))
 	}