A lot. There are many people in Shenzhen Bay Swimming Pool in summer, and the average daily number of people in summer is 1500. Shenzhen Bay (called Deep Bay outside Chinese mainland) is a bay between Hong Kong Special Administrative Region of People's Republic of China (PRC) and Shenzhen City of Guangdong Province. Its exact location lies between China, Hongkong, Northwest New Territories and the eastern part of Nanshan District, Shenzhen City, Guangdong Province, China. It is located in the west of Yuen Long Plain and the east of Shekou.