A staff member of Tsinghua University holds a sign which says that the visitor quota is full and the waiting line is closed for the day, August 1, 2016. During summer vacation, Tsinghua University, along with its neighboring Peking University, becomes a hot tourist destination, especially for parents who want their children to excel academically. To maintain order, Tsinghua University recently announced that it will limit visitor numbers to 5,000 a day. On August 1, that number reached the limit at around 3 pm. [Photo/VCG]