In Jiangnan (Shanghai/Suzhou)
百页 (also written
百叶) means the thin pressed tofu sheets used in
百页结 (tofu-sheet knots) and
百页豆腐. The character
页 'page' captures the leaf-thin sheet form. Distinct from
牛百叶 (beef tripe), where the same word names the multi-layered stomach lining.