Chinese girls do not refuse foreign marriage. If you look like Afghans, you will be more popular, and if you look like an Indian, you may have some difficulties. Secondly, if you have money, high EQ and enough free time, you will be more acceptable.
There are not many Chinese who believe in Christianity, the vast majority of Chinese are atheists, followed by Buddhists and Muslims, and there are few Christian girls.
Chinese girls may be reluctant to live in Pakistan, why don't you consider settling in China?