Why are there so many planes over Suihua these two days?

There may be several reasons for the increase in aircraft over Suihua in the past two days:

1. Normal training: aviation units or flight academies may conduct daily training, which requires a lot of flight time, so there may be more planes over Suihua.

2. Exercise or test: In order to maintain and improve the combat skills of pilots or test new aviation equipment, flight exercises or tests may be conducted over Suihua.

3. Route adjustment: In order to meet the needs of air traffic, or make regular flight adjustments, the number of flights may increase over Suihua.

4. Weather factors: If the weather conditions are complex, such as large-scale airflow or wind direction changes, aviation units or airlines may increase flight training or adjust routes to adapt to the weather conditions.

The above contents are for reference only. If you need to know more about the reasons for the increase of aircraft over Suihua, it is recommended to consult relevant official announcements or news reports.