I assume you are not US citizen, then I wonder how you got the US goverment job?
Have your hu*****and found a job in China?
Which city does he plan to go?
Which industry does he work?
Do you own property in the Chinese city where he is going to live and work?
I assume you will take care of children, so I assume again your parents will stay with you. In that case your children will attend US schools and stay in this country. Then I wonder why you two decided to leave a foot in China, for retirement?