diff --git a/genshin.py b/genshin.py
index 0e78bb7..3017f9b 100755
--- a/genshin.py
+++ b/genshin.py
@@ -16,21 +16,21 @@ logging.basicConfig(
 
 class ConfMeta(type):
   @property
-  def index_url(cls):
+  def index_url(self):
     return 'https://webstatic.mihoyo.com/bbs/event/signin-ys/index.html'
 
   @property
-  def ua(cls):
+  def ua(self):
     return 'Mozilla/5.0 (iPhone; CPU iPhone OS 14_0_1 like Mac OS X) '  \
             'AppleWebKit/605.1.15 (KHTML, like Gecko) miHoYoBBS/2.1.0'
 
 
-class Conf(metaclass = ConfMeta):
+class Conf(metaclass=ConfMeta):
   pass
 
 
 class UID(object):
-  def __init__(self, cookie:str = None):
+  def __init__(self, cookie:str=None):
     if type(cookie) is not str:
       raise TypeError("%s want a %s but got %s" %(
           self.__class__, type(__name__), type(cookie)))
@@ -53,7 +53,6 @@ class UID(object):
     }
 
   def get_uid(self):
-    # XXX Loop this code for try N times ?
     try:
       jdict = json.loads(
               requests.Session().get(
@@ -69,21 +68,40 @@ class UID(object):
 
 
 class Sign(object):
-  def __init__(self, cookie:str = None):
+  def __init__(self, cookie:str=None):
     if type(cookie) is not str:
       raise TypeError("%s want a %s but got %s" %(
           self.__class__, type(__name__), type(cookie)))
 
     self._url = 'https://api-takumi.mihoyo.com/event/bbs_sign_reward/sign'
 
+    uid = UID(cookie)
+    errstr = None
+
+    for i in range(1, 4):
+      try:
+        self._uid = uid.get_uid()
+      except HTTPError as e:
+        logging.error("HTTP error when get UID, retry %s times ..." %(i))
+        logging.error("error is %s" %(e))
+        errstr = str(e)
+        continue
+      except KeyError as e:
+        logging.error("Wrong response to get UID, retry %s times ..." %(i))
+        logging.error("response is %s" %(e))
+        errstr = str(e)
+        continue
+      except Exception as e:
+        logging.error("Unknown error %s, die" %(e))
+        errstr = str(e)
+        raise
+      else:
+        break
+
     try:
-      self._uid = UID(cookie).get_uid()
-    except KeyError as e:
-      logging.error("get uid failed, request is %s" %(e))
-      raise
-    except Exception as e:
-      logging.error("Unknown error %s" %(e))
-      raise
+      self._uid
+    except AttributeError:
+      raise Exception(errstr)
 
     self._cookie = cookie
 
@@ -103,7 +121,7 @@ class Sign(object):
     }
 
   def run(self):
-    logging.info('UID is %s' %(str(self._uid).replace(str(self._uid)[4:8],'****',1)))
+    logging.info('UID is %s' %(str(self._uid).replace(str(self._uid)[3:6],'***',1)))
 
     data = {
         'act_id': 'e202009291139501',
@@ -114,19 +132,20 @@ class Sign(object):
     try:
       jdict = json.loads(requests.Session().post(
           self._url, headers = self.get_header(),
-          data = json.dumps(data)).text)
+          data = json.dumps(data, ensure_ascii=False)).text)
     except Exception as e:
       raise
 
     return jdict
 
-def makeResult(result:str, data = None):
+
+def makeResult(result:str, data=None):
   return json.dumps(
-      {
-          'result': result,
-          'message': data
-      },
-      sort_keys=False, indent=2
+    {
+      'result': result,
+      'message': data
+    },
+    sort_keys=False, indent=2, ensure_ascii=False
   )
 
 
@@ -138,7 +157,7 @@ if __name__ == "__main__":
 
   try:
     jdict = Sign(input().strip()).run()
-    jstr = str(jdict)
+    jstr = json.dumps(jdict, ensure_ascii=False)
     code = jdict['retcode']
   except Exception as e:
     jstr = str(e)
@@ -155,4 +174,5 @@ if __name__ == "__main__":
   if code in [0, -5003]:
     result = makeResult('Success', jstr)
 
-  logging.info(result.encode('utf-8').decode('unicode_escape'))
+  logging.info(result)
+