A few days ago, my father gave me an old book (incomplete volume) for everyone to help me identify it.

This is Shi Yinben in the early days of the People's Republic of China: Almanac (also called the Yellow Calendar).

Published in 195 1. (forty years of the Republic of China).

I don't always say, "You're talking about an old calendar book". In other words, it is "expired and invalid".

Huang also writes about emperors. Because the almanac was published by the royal Qin Tianjian.