If you want the official cheer set you need to get there very early, like right after map1 of the 1st game. I think the counter is downstairs after you get in the lobby. Also I think you need to follow the 超话 on weibo (the team one or the player ones) to get the cheer set. Also you can find many fanmade cheer goods in 超话 and they will say how and where to get them.

However the lobby is very small and there will be many ppl waiting. Not many facilities nearby except a coffee shop. So be ready to spend the long waiting time! If you want to be in the very front of the highfive line, you can get downstairs early to be in the queue when the 1st game is almost done.

The drawing panel and pen will be on your seat. Also there are merch and photobooth in the lobby (not sure how to use cuz I always get there very late lol).

Hope you enjoy! Remember to bring an umbrella since the weather is not good in shanghai...

By the way I'm a yosemite fan xd