When will Air China inform the interview?

As for when you can get the interview results, it depends on the specific situation. Some big companies have to wait until all the people in the country have finished interviewing before selecting outstanding talents, so the results may be answered later, about a week or two, and some companies that don't need to recruit too many people will reply faster, about two or three days. China Life is a big company, so it will be slow, but if you don't receive the interview results for two weeks, I suggest you send an email or call the internal recruiter.