Chatbots is a rather vague/broad way of describing this. It's a lot more than that. It's a combination of AI, Facial Recognition, Voice Recognition, Social Media (WeChat) ... Apparently, it has a visual appearance based on one of the real judges.
At the official website, they also refer to it as AI judge.
Besides that, it is using facial recognition and voice recognition through WeChat running on mobile devices.
Gaming is one of the most profitable industries in China’s tech sector. China's gaming industry generated almost 40 billion USD last year. It is doing well but the future is very unpredictable. Strict local regulation and trade war together is just not a healthy combo.