Why is the plane from Qinhuangdao to Guangzhou grounded?

The main reasons for the grounding of aircraft from Qinhuangdao to Guangzhou are the impact of epidemic situation and the need for epidemic prevention and control. The reason for this is the following：

The route was first operated by Hainan Airlines. The timetable is every Tuesday, Thursday and Saturday, and back and forth on the same day. Flight time: take off from Guangzhou at 9:20 and arrive in Qinhuangdao at 12:20; /kloc-take off from Qinhuangdao at 0/3: 30 and arrive in Harbin at 0/5: 30. 16: 15 took off from Harbin and arrived at Qinhuangdao at 17:45; /kloc-take off from Qinhuangdao at 0/8: 30 and arrive in Guangzhou at 2140. The basic fares are: Qinhuangdao-Guangzhou 2 180 yuan, and Qinhuangdao-Harbin special 950 yuan (excluding airport construction fees and civil aviation development fund), which will benefit the people at a 30% discount at the initial stage of the resumption of flights. The resumption of flights from Guangzhou to Harbin will build a convenient air passage for economic and trade activities, business exchanges, tourism and holidays between Qinhuangdao and the Pearl River Delta and the hinterland of Northeast China.