Three Shaos: Shao Shi, Shaobao and Shaofu.

The third mother: Taijiang, Tae In and Tess.

Sangong is the collective name of the three most prominent official positions in ancient times. After the Qin dynasty, the establishment was mostly in vain. It is said that this word was already used in the Zhou Dynasty. According to The Book of Rites and Biography, the scholars in the Western Han Dynasty thought that "the three public means Sima, Situ," and so on. According to Zhou Li, classical scholars in ancient China believed that a surname, a teacher and a Taibao were three kinds of public officials.

Extended data:

In ancient times, princes and doctors adopted sons and chose three concubines as teachers, loving mothers and nannies, which were called three mothers. Sima Jun, Biography of Nanshu Scholars: "The inner saying is:' Choose mothers who are capable and make them teachers, and then take loving mothers and wet nurses. "This choice of mother is to choose people, to choose a third mother, not to choose a brother's mother. "See the Book of Rites.

Miki refers to the three virtuous wives of the Zhou Dynasty. Han Liuxiang's Biography of Three Daughters: "The three mothers are Tai Jiang, Tai Ren and Tai Si."

Reference source: Baidu Encyclopedia-Sangong

Reference source: Baidu Encyclopedia-Sanshao

Reference source: Baidu Encyclopedia-Miki