What's the difference between Weihai and Rizhao (the more detailed the better, thank you)?

The sea water in Weihai is very clear and the environment is good. Sunny sea water is not very good. After all, the sea becomes turbid when there are too many people playing. But look at the city. There are many people in the sunshine and life is convenient. Weihai is sparsely populated. It may be better in densely populated areas. Besides the sea, there are many places to play in the sunshine, but there are few places to play in Weihai.