China's works are about birthdays.

Shao Weihua's vision of four pillars. Four-poster class handout, Shao Weizhong's four-poster answer. Four-pillar analysis, Guo Yaozong's four-pillar numerology prediction. Lin Guoxiong's eight-character realm, Yuan Shushan's origin of numerology, Li Shunxiang's four-column set and four-column mystery, and Taiwan Province's Zhong Yiming's modern numerology practical set are too numerous to mention. These are modern and well-known practical users in China.