@ArouserRebel @_ericting It's only required for large events with over 5000 people. Whether they're "crowded" or not is going to vary but it is pretty hard to have 5000 people in one place where no one is near anyone else.
@只有5000人以上的大型活动才需要。他们是否“拥挤”会有所不同，但在一个没有人靠近其他人的地方，有5000人是相当困难的。