You are right.This young man asked about Chess clubs systems and how to get certification on xiangqi. He wish to learn more about xiangqi and maybe inspired to get a good certificate to show his family. Then maybe he wasn't used to see half English half Chinese sentence (many people too I believe), so made that remark. He didn't say wrong, he just being tactless. Just tell him that it is not right to make such comment as some people might not like it. No point think until so complicated like he is trying to create trouble and start attacking him with many repeated post.