Yu Rongkuan’s “A Brief Introduction to Suji, the Secret Key to Participating in the Stars” with a Picture of a Precious Mirror

Supplementary picture of Suji Baojing. Qing Dynasty. Compiled by Yu Rongkuan. Qing Dynasty Zhumo fine banknote, high-definition

Sanyuantang “Suji Tongshu”

The ancient book of choosing a day “Tianbao Louding Dasuji Tongshu” Guangxu 14th year 293 pages

Supplementary picture of Suji Baojing. Qing Dynasty. Compiled by Yu Rongkuan. Qing Dynasty Zhumo fine banknote