In early July 2016, I visited Florence again. After waiting in line for half an hour or so, I finally got into the hall of Notre Dame's Baihua Cathedral. Tourists visit free of charge, control the number of people at the entrance and maintain order. The altar part in front of the church is not allowed to be approached. It can only be seen from afar. Visitors can enjoy the hall in other places. Domes and bell towers need tickets and long queues, which take more time.