How many classes are there in Xiaoyi Xing 'an Chemical Plant?

Xiaoyi Xing 'an Chemical Plant implements three shifts. According to relevant public information, the three classes are at 8: 00, 4: 00 and 0: 00 respectively, and there are four public holidays in a month. The address is located at Fenjie Road, Aluminum Industrial Park, Xiaoyi Economic Development Zone, Lvliang. Scope: General projects: ordinary nonferrous metal smelting.