I think it would be much harder to argue that bronze metallurgic technology was introduced from the west as well. Chariots did not appear in China until about 1300 BC, but the Bronze Age in China began hundreds of years previously, in about 2100 BC. If you were to argue that bronze was introduced to China by swift-riding charioteer Caucasoid groups, then the dates of the introduction of bronze and the chariot shouldn't be so far apart in the timeline; in fact, if you proposed that argument, they should be dated to the same century. This is not the case. I think it is safe to assume the Chinese invented bronze separately long after it was invented first elsewhere in Eurasia.
These lies should not spread. It is hard for them to accept and believe that we are one of the few 'non-white' people to develop our own form of civilization and at very high sophisticated level too.
Dude, we're talking about the Bronze Age here. Societies across the globe weren't that sophisticated. I'm sure that even the scholarly gentlemen of the Han Dynasty would find the life and customs practiced by the early Shang people to be uncultivated, repugnant, and dirty. Lol.
Besides, the Chinese didn't need foreign aid when they invented the world's first blast furnaces, cupola furnaces, finery forges, puddling processes, cast iron, co-fusion steel, etc.