Is there a way to find out which denomination a church calling themselves "福音派" belongs to?

Some underground church in mainland China said that they are a branch of a Christian denomination called "福音派", which also exists in US and other places in the world. But they were not able to name it in English, except that one member mentioned the word of "assembly", despite not being able to confirm whether it is "Assembly of God". By searching on the censored Internet (the one only available in China), "福音派" seems to be a translation of "evangelical", while "派" means denomination. If I am correct, "evangelical" isn't just a denomination, but a group of conservative denominations, at least in US. Also, I am not sure if there is any mainline denomination in mainland China. It seems to make sense to think of the church as evangelical, since it constantly gives out a conservative feeling, both biblical and political. (The preacher keeps saying that gays are promiscuous and will go to hell, by citing the bible, and claims that the American churches accepting the LGBTQ movement betray the bible. He also keeps requesting every one to keep the church's location a secret, while denying their religious freedom having been infringed at all, and furthermore feeling grateful to the government for not having found it out and/or not having shut it down.) Is there a way to find out which denomination the church (or a church calling themselves "福音派") belongs to? Is there more than one evangelical denominations whose names include "assembly"? Does "福音派" in China mostly likely refer to one particular denomination?