test_server/client failed to connect in docker container

[Allennnn2022]

I run test_server with：/test_server -a 172.21.112.1 -p 4488 -l e > /dev/null &
and test_client with: test_client -a 127.0.0.1 -p 4488 -s 1024000 -l e -E in different docker container,
however client fails to connect to the server with error message：

and catch no package in wireshark
If I run client with other server ip, it seems to work but still no response, then connection close

differently, I can catch quic packages in wireshark
What 's the problem?