No one is infected. State Grid Corporation system unit staff canteen is not contracted. System units of State Grid Corporation of China provide employees with a meal subsidy every year, so there is no need to outsource the canteen to provide dining services for employees. Power supply company system units set up their own canteens, which are responsible for employees' dining. Therefore, the staff canteen in the power system unit is not for profit, because the internal dining in the company system is subsidized and the canteen cannot be contracted out.