You hu*****and thinks you are living seperately, even though you are together in weekends and holidays. He seems to have different concept of family than you does. To him, family means being together everyday. Acutually, I think this is a good charactor of a family man who you can trust.
You and your children may sound not need him that much, but his family in China wants him badly. He may feel more appreciated in China then here. Or, maybe he has given up on waiting for you to join him?
To me, I believe family is more important than anything else. Unless my hu*****and failed me, I'll try my best to keep the family together.
"You support me not to quit my job? to live seperately?" When you ask this question, you probably have decided to do so, as you aleady did for several years. For your children's best interest, the family together is the best. For yourself, maybe your choice of career is better. No one can tell.