Annual cards are cheap, and public swimming pools don't have much money. If you are a long-term swimmer, it is most appropriate to apply for an annual card. But I suggest you find a swimming pool with a membership only. There are no individual travelers, the swimmers are of high quality, the water quality is guaranteed and the environment is good. There will never be such a thing as jiaozi, and the price will not be much more expensive than that of the whole people.