I'm sure going to a different country and experiencing how that culture views and cares for their pets would be quite a shock and probably very disappointing to you. Hopefully, during your time in the country you can do some small part in helping to promote awareness of some of the best practices for budgie care which are followed in other parts of the world.
By helping that country's budgie owners learn and grow, it will help benefit all the little budgies whose owners have not been exposed to advances in how to best care for them for their ultimate health and well-being. As each person learns and shares their knowledge, then practices in that country will improve overall.
The other posters have offered you good advice with regard to treatment of the feather mites.
Additionally, you may find the article in this link helpful as well:
Feather Mites - Budgie Health
When you complete your studies in China are you planning to take your budgie back to your home country with you?
How long do you have before you are finished?
By helping that country's budgie owners learn and grow, it will help benefit all the little budgies whose owners have not been exposed to advances in how to best care for them for their ultimate health and well-being. As each person learns and shares their knowledge, then practices in that country will improve overall.
The other posters have offered you good advice with regard to treatment of the feather mites.
Additionally, you may find the article in this link helpful as well:
Feather Mites - Budgie Health
When you complete your studies in China are you planning to take your budgie back to your home country with you?
How long do you have before you are finished?