from 9: 3 am to 18: 3 pm. Henggang Glasses City is the largest professional glasses market in Longgang District, Shenzhen, with a large daily traffic. In order to facilitate customers to buy and rest, the glasses city chooses to open from 9: 3 to 18: 3 every day. According to Baidu map information, the address of Henggang Glasses City is No.4169 ~ 4173, Henggang Section, Longgang Avenue, Longgang District, Shenzhen City, Guangdong Province.