What does Chinese old core mean?

This word is a concept of artistic style. It is one of three styles: monstercore, dreamcore and oldcore. Monstercore, dreamcore, and oldcore are some of the surrealist aesthetics centered around amateur or low-quality photography or visual imagery. "Chinese oldcore" is a localized weirdcore style that emerged on the Chinese Internet. It incorporates strong Chinese style elements and often overlaps with scenes we are familiar with.