1. The icon will be displayed when the offline double reward has not been collected;
2. When watching the video, the button status will be updated based on the ad loading status.
3. The condition for airline upgrade will no longer be the highest ticket revenue in a single day.
4. Improve city UI and add city type information
5. Adjust the prices of some airport construction projects
6. Reduce the time required to open some routes
7. Fix some known bugs