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.

See, for instance, Stigler's Law https://en.wikipedia.org/wiki/Stigler%27s_law_of_eponymy (for the concept an example itself)

> There are no prizes for being second in science.

The reply (second quote above) fits in context, but there is more to it.

1. Publishing early at the expense of quality has a way of catching up to one's reputation. (Hopefully.)

2. History has many examples of scientists who were "too early" or not "in the right place at the right time" to get recognition.

3. A result may get little attention in one field but a lot in another. One example that comes to mind are string-matching algorithms. Sometimes they seem a dime-a-dozen in CS. But the "right" ones have transformed DNA sequencing.