Remember when China just used to copy everything? That was called the shanzai model, everyone copied each other, but the part that the West missed was that they didn't just copy; they also made small incremental improvements.

Chinese manufacturers organically discovered and adopted an open source process for hardware development because those who didn't operate in the open got wiped out by the market.

An entire generation of Chinese engineers have grown up an an environment where openly copying and improving and sharing is the norm, and people working in secret is viewed as silly and somewhat suspicious, and doomed to failure.

So when Chinese see OpenAI etc going closed source, it's very confusing to them, because they know this approach is a dead end.