>Food
Literally just rehashed Manchu, Mongol, Central Asian, and SE Asian cuisine, with the Portuguese throwing in some New World plants; much of it invented by the new CCP to claim "5000 years of history"
>Language
"Chinese" as we know it today, simplified OR traditional, wasn't invented until after 1900, and before that it was really like 10 separate languages that just happened to use the same writing system and literary form of the language, but Mandarin was chosen among them to be the national languages and is now driving the others into extinction; you wouldn't believe it, but half of all Chinese words (not characters) come from Japanese and were invented as part of the Meiji Restoration, and even many common standalone characters, like "dog" and "river", come from SE Asian languages
>Intellectuals and philosophers
Buddha is openly an Indian import, and a lot of Confucius's ideas are likely lost traces of Jewish monotheism (compare Chinese "Shangdi" to Hebrew "Shaddai")
>Nationhood
The modern notion of "a China" wasn't really a thing until the 1900s; independent unified statehood often separated by centuries of division / foreign rule, with much of the original national identity forgotten, and subsequently artificially "reconstructed"; Chinese out there thinking they're Jews or sth calling themselves the "master race" when genetics tell a much different story (e.g. coastal Chinese people all the way up to north of Shanghai are almost guaranteed to have some kind of SE Asian genetics, and this is even reflected in local dialects)
>Cultural heritage
Many historic national monuments like the most popular Great Wall sections, Tian'anmen Gate, the Terracotta Warriors (I think), and almost all places marketed as "old towns" are 1970s-or-later reconstructions, because Mao destroyed almost all existing cultural heritage during the Cultural Revolution; I've literally been to supposedly "ancient" temples in China that have plaques written in simplified characters