I am a Zimbabwe passport holder, living in El Salvador

(1) Where and How would i go about applying for a Working Z type. I have the possibility of a 2 year contract in Chongqing.

My family will travel with me.

(2) My wife is a Salvadorian passport holder, she does not have any job offer. Please advise on her status, and what type she might need.

(3) My 7 year old daughter is a Salvadorian passport holder. Please advise on her status, and what visa she might need.

Thanks