100- 120 people. It depends on how many test lines there are. Each line has about 40 people a day, and Huai 'an Zhongshan No.3 Middle School has about 100- 120 people a day. Huaian is located in the north-central part of Jiangsu Province, east of Jianghuai Plain. Located in the Yangtze River Delta, it is an important central city in northern Jiangsu, a close-knit city in Nanjing metropolitan area and the first city in the Huaihe River eco-economic belt. It is located at the intersection of the ancient Huaihe River and the Beijing-Hangzhou Grand Canal, on the Huaihe River line in Qinling Mountains, the north-south boundary of China.