http://www.iqiyi.com/v_19rrnnwdnw.html
YH has this nickname 网红, which means he's very popular on the internet.
We know how he worked so hard to use Chinese to interact with the fans. The reporters are particularly impressed that he's able use internet slang like "dang" and wondered if he knew the origin of that. YH knows! It came from Jackie Chan's shampoo CF in China. When asked how come he knows so much, he said sometimes he asks the staff and most of the time, fans mention him on weibo for all these interesting info. So he really has fun interacting with fans on weibo.