The constellation is determined by the date of the solar calendar. Lunar calendar1April 6, 983, the Gregorian calendar date is1May 8, and the constellation of that day is Taurus.
Lunar calendar: the sixth day of April in the year of the pig
Main branch: Wu Binggui Haidingsi
Gregorian calendar:1May, 9831Wednesday, 8th Taurus
Source: Hua Wang.