Is the Qing Palace calculated according to the lunar calendar or the solar calendar?

According to the inquiry of Fertility Help Network, the map of Qing Palace is calculated according to the lunar calendar. Because the spread of "Qing Gong Tu" is a set of methods for predicting and analyzing pregnancy based on the exchange of experience among the imperial doctors in the Qing Dynasty, and it is based on the lunar calendar before and after the Qing Dynasty in China, it is said that "Qing Gong Tu" is calculated according to the lunar calendar.

The lunar calendar, that is, the current traditional calendar in China, belongs to the yin-yang calendar, that is, the lunar calendar and the solar calendar. According to the change cycle of the moon phases, each moon phase changes to one month, taking the tropical year of the sun as the length of a year, and adding 24 solar terms and setting leap months to make the average calendar year adapt to the tropical year. The combination of lunar calendar and solar calendar in lunar calendar forms the method of combining yin and yang. Because of the use of "Xia Zheng", it was called Li Xia in ancient times. The current lunar calendar was renamed as "Summer Calendar" after 1970.