data = event['queryString']
        print (data)
        if len(data) == 0:
            return "hello, this is handle view"
        signature = data['signature']
        timestamp = data['timestamp']
        nonce = data['nonce']
        echostr = data['echostr']
        token = "service37llj0f61304330606gzap" #请按照公众平台官网\基本配置中信息填写
                return echostr