Just like we queue up for security check, we need to go through one by one, so there will be people who have received some news and some are still waiting anxiously there. Another reason for the short message interface failure is that the interface of the cooperative verification code short message platform has failed, resulting in the delay of verification code short message. The server's carrying capacity is low, and some platform servers can't meet a large number of sending requirements, which will cause congestion or other abnormal conditions of the SMS gateway, thus leading to the delay or packet loss of the verification code SMS.