1. Check account login: Make sure to log in to Air China App with the correct account. Check whether your user name and password are correct, and confirm whether the account you use is consistent with the information provided when you purchased the ticket.
2. Check the network connection: Make sure that your mobile device is connected to a good network environment. If the network signal is unstable or the connection quality is poor, the order information cannot be loaded and displayed normally.
3. Contact customer service: If you still can't find the information of purchased air tickets after trying the above methods, I suggest you contact the customer service department of Air China for consultation and solution. They will be able to provide more accurate help and solve your problems.