As a non-Chinese scientist, I can attest that there is intense pressure to publish as many papers as possible pretty much everywhere, and this leads to a problem of bad research across the world.
China may be among the worst offenders in this respect, but the particular thing the OP is asking about doesn't strike me as a Chinese-specific thing at all. I see non-Chinese scientists rushing half-baked results to arXiv all the time.
As a non-Chinese scientist, I can attest that there is intense pressure to publish as many papers as possible pretty much everywhere, and this leads to a problem of bad research across the world.
China may be among the worst offenders in this respect, but the particular thing the OP is asking about doesn't strike me as a Chinese-specific thing at all. I see non-Chinese scientists rushing half-baked results to arXiv all the time.