I've received this note from a friend, who is a Chinese CTF player:
恭喜！收旗爲：ＨＶ２０｛獭慬氭敬敧慮琭扵瑴敲晬礭汯癥猭杲慳猭浵搭桯牳ｅ｝
Unfortunately, Google Translate wasn't of much help: 
I suspect the data has somehow been messed up while transmitting it.
Sadly, I can't ask my friend about more details. The Great Chinese Firewall is thwarting our attempts to reach each other, and there's no way I'm going to install WeChat on my phone.