Is it serious for Shang Yi to work overtime in mathematics?

Nothing serious. According to the information of official website, the working hours of Yishang Mathematics Department are from nine to five, with weekends. Some projects will have overtime, mainly projects. Overtime is not serious, and people who work overtime will also pay corresponding labor remuneration. Shang Yi Mathematics Department was established on May 29th, 2008, and its address is Xintiandi Jiayuan, northeast of the intersection of Xinkai Road and Huajie Road in Hedong District.