What are the traditional superstitions in China, such as divination and geomantic omen, which must be unique to China?

Divination is also found abroad, such as astrolabe. It's just that China's divination is related to Otawa's five elements and main branches. This is the same as the theoretical core of traditional Chinese medicine (because both describe the interaction between human body and the outside world).

It's a pity that none of these things in China are superstitious. As long as it is formal, it can withstand scrutiny and can be verified. Superstition is a state of mind, that is, many things are accepted or denied in a muddle, which is a reflection of low thinking level. Of course, high-level thinking does not necessarily lead to correct results. As the saying goes, a fool gets what he deserves, but a wise man worries about what he loses.