Sometimes, research is useful simply for confirming what had long been known.
Rather interesting that 10% of the non-Christians converted during the 3-4 year study.
The 10% over 4 years represents nearly 100% over a lifetime. Given the rate of conversion will drop year by year for the remaining population this still leaves a bare minimum of 50% conversion. Some missionaries estimate the rate of practicing Christians in China is more than 25%. It is especially notable that government repression of Christians and Christianity is rampant especially in rural communities.