China's large quantity of people is due to agriculture and by definition they're technically not overpopulated they just have highly dense cities. But it's an agricultural thing not a religious thing.
China's rice production on its own causes a massive protein shortage,
which is only circumnavigated by over-fishing by as much as 700%.
Had they farmed protein in balance with rice, they would have
required a much smaller population.
This is actually the story of Cane and Able.
But instead of reading the book, china poison the world's food supply
with toxic fake food like soya, because it is cheap to produce.
For example, they replaced sunflower oil with soya in tinned tuna
without significant warning, for example. This is purely to use the
healthier sunflower oil as biofuel!
These sorts of endless cheapening of all such products is typical
of the global chinaconomy, and causes all sorts of vitamin deficiencies
which then get covered up by other quackery - which then also gives
them reason to impose global communism via their proxies at the WHO.
And yes,
fundamental honesty is the epitome of all successful religions;
whereas materialist dogma, well that just always ends up in
dog-eat-dog 'communism' = warfare.
Then these wars, the religious always win too, much to the
wailing and gnashing of teeth of the overpopulators.
And as for what constitutes genuine religion,
I suggest you study this movie closely: