The US delegation sent a message to the rider and disappeared in a few seconds.

Are you asking what happened when the US Mission sent a message to the rider and disappeared in seconds? Network problems, account problems, mobile phone rights problems.

1. Network problem: There is a problem with the Meituan platform server, and the message cannot be sent. You can try logging in again, or wait a while and try again.

2. Account problem: The rider's account may be blocked or abnormal, resulting in the inability to receive messages. At this time, you need to contact Meituan customer service to solve the problem.

3. Mobile phone permission: The permission setting of the rider's mobile phone may prevent the US group from sending messages. Need to check whether the notification authority and network authority of the mobile phone are turned on.