Moroccan citizen with passport would like to live with fiance from US working in China.

I am a US citizen taking a teaching job in china in a month. I do not have a work Z yet, but I will have a tourist L for China soon. My fiance also needs a visa, but he is from Morocco and has a Moroccan Passport. I would like him to live with me in China. A Chinese resident friend agreed to send him an invitation stating I will be cover all of his costs while in China. I need to know what type of visa he will need, and if he can get multi-entry and for how long so we can leave and come back to mainland China. My contract is one year. We would also like to get married in China. I do not know how that changes things for us, if it does at all. Will the embassy accept he has a one way ticket because we do not know the date he will be returning to Morocco yet. Any information would be helpful. Thank you.