The thing to worry about in China is that their leader said recently that they were going to create their own brand of Christianity. Now that will not stop the underground Christianity that is based in Christ, that missionaries for centuries brought from America.
In fact L. Nelson Bell, the father or Ruth Graham Bell, was a missionary to China, as well as, Pearl S. Buck (Author) and her family; parents: Absalom & Carolyn Syderstriken.
In fact, Pearl S. Buck wrote many books about China and the Christianity planted there.
Here is a list on Wikepedia of the Missionaries from Protestant Churches, although probably missing hundreds from some of the lesser denominations...we don’t know the impact some of these people had on China, it was huge!
http://en.wikipedia.org/wiki/List_of_Protestant_missionaries_in_China
Protestants showed up 500 after the Catholics.
http://en.wikipedia.org/wiki/List_of_Roman_Catholic_missionaries_in_China