The renovation began in March on auspicious day of the ecliptic.

March 1 day, March 10, March 15, March 19, March 22, March 26 and March 30 are all very suitable for renovation.

The auspicious day of the zodiac is a unique term in China's traditional calendar "Huangli" (perpetual calendar), which refers to a day when everything goes well. In the Gregorian calendar, "Qinglong, Tiande, Yutang, Siming, Tang Ming and Jingui" in the Twelve Gods are called six zodiac days, and "Removal, Danger, Determination, Persistence, Success and Openness" in the Twelve Duty Days is also called the Little Zodiac Day. When the six gods of the zodiac are on duty, everything is appropriate, and they can't avoid evil, that is, "the zodiac is auspicious."

According to the influence law of celestial bodies and astrology on human beings, the ancients formulated the Yellow Mafia Day, which provided certain reference and choice for China people to choose a day to avoid disaster. This auspicious culture has been deeply rooted in the thoughts of the people in China since ancient times, and has been affecting the lives of the people in China, and has formed a custom.