The Qing Gong Chart consists of two parts, the horizontal coordinate is the month of pregnancy, from January to December, and the vertical coordinate is the age and the year of birth of a woman, the year of birth of a woman is from 1971-1998, and the age of a woman is from 18 years old to 45 years old, which is counted in the lunar calendar by the imaginary age (i.e., the real age plus 1 year), and the month of pregnancy is the month of conception.

The Qing Gong Chart uses the imaginary age algorithm because the Chinese were very filial and respectful of their mothers in ancient times. When a mother carries a child for ten months, she counts the ten months in her womb as her age, as a way of thanking her for the pain she endured for herself during these ten months.

Expanded Information

The palace birth control table is mainly for women, and is based on the woman's age and the month of conception. Because the table is based on the ancient laws of the heavens and the earth, it is necessary to adopt the traditional method of calculation. For example, the age of the woman should be the year of birth plus 9 months of the lunar calendar, and the month of conception should be based on the lunar month.

It is rooted in the Zhouyi, according to the yin and yang, five elements, gossip formula projection, roughly more than 300 years of history, by the eunuchs in charge of the various dynasties, the birth of a boy or girl in the Qinggong table in the 1 ~ 12 is on behalf of the month of pregnancy, 18 ~ 100 on behalf of the age of the woman, the birth of a boy or girl in the Qinggong table is the calculation of the virtual age.