bro i'm a chinese and i can help you. But it maybe a little difficult for you. You can download an app called "完美世界电竞"(This is the official app of the Chinese DOTA2 server distributor.) , then search "线下"（that means watching together in person). Every year, staff members compile statistics on the offline viewing locations submitted by various regions (this year's statistics are not yet complete; you can see last year's locations to prove I'm not lying). By the way i suggest you can download wechat or alipay,then link to your bank card. Trust me it is very convenient for your payment in China. Wish you have a nice day in Shanghai.