China Airlines people are generally OK.They want people to come.
The interview and Sim Check process would have to be the easiest anywhere.
The story is different once you get there.
Don't expect upgrade as the latest that I hear is the company will be completely national within 10 years.Only nationals will be upgraded.
Three Airbus F/O have just left because of the promotion problem. Company expect about 10 more to leave soon. Rumours of three or four on boeing fleet
Be careful if you hope to if you hope to get the endorsement and some time to move on as the Taiwan Licenceand Rating is not accepted anywhere else. You might be wasting your time.
Good luck