Gregorian calendar: 12 o'clock on October 21, 1990 (Sunday)
Lunar calendar: noon on the fourth day of September in the Gengwu year
Spring Festival: January 27< /p>
Before the festival: Jisi year
After the festival: Gengwu year
Eight characters: Gengwu Bingxu Jiwei Gengwu
Five elements: gold, fire and fire Earth, Earth, Metal, Fire
The five elements lack water, water