What is the origin of Ce Shen?

Zigu is also called Gucci, and in the north she is called toilet aunt and pit aunt. The ancient folk custom is to offer sacrifices to Ce Shen Zigu on the 15th day of the first month, and to offer sacrifices to silkworm and mulberry, which shows many things. Legend has it that Zi Guyuan was a concubine and was envied by her eldest daughter. On the fifteenth day of the first month, he was killed in the toilet and became Ce Shen. So most people make their daughter-in-law into the shape of a woman and greet her in the pigsty in the toilet at night. This custom is popular in the north and south, and it was recorded as early as the Northern and Southern Dynasties.