what are documents needed when myanmar citizens apply for multiple entry visa?

May I know the purpose of visit? as I know, it is only available for Chinese citizens' spouses or those who have housing property over there.

we have 2 myanmar nannies taking care of our 1 year old twin boys. as we have friends and business interest, we visit there very often. Hence it will be practical to apply for multiple one so when we need to travel at short notice, they can go too. We can't leave the toddlers at home and neither can we travel without the nannies. So far they have been to Hong Kong and and Malaysia with us.

You can have a try to apply for them with invitation letter from your friends, and other proof that you have to go with them frequently to mainland. But it is difficult if they apply Chinese visa for the first time.