Who invented the Gregorian calendar in China?

Six ancient calendars used in China before the Western Han Dynasty. Namely Huangdi calendar, Zhuan Xu calendar, Xia calendar, Yin calendar, Zhou calendar and Lu calendar. Legend has it that the calendar created by the Yellow Emperor is the oldest. Lu, a poet in the Tang Dynasty, wrote "The Seal of Chinese Harmony Songs": "The Yellow Calendar is the abbreviation of the Yellow Emperor Calendar, so people are used to calling it the Yellow Calendar. Later, the yellow calendar is often mixed with many contents that promote auspiciousness and taboo, and the superstitious color is very strong, so the yellow calendar has become the name of the old calendar book.