By this standard, no one could ever say anything about "China" at all. Sam Altman says that the Chinese economy passed the U.S. Was that the Uighur economy? Tibetan economy? Subsistence farming economy? City-dwelling economy?

See how these questions add nothing to the conversation?

If the conversation is about China collectively, then it's not invalid to make other statements about China collectively. If you disagree with the parent's assertions about China, then let's hear it, but just pointing out that China is really big does not tell us anything we don't already know.