"The technique of 'nine shallows and one deep'. This technique is mentioned in the quote from 'Inside the House', but its exact meaning has always been unclear in the past.

In addition, the quote from "Inside the Room" also mentions "ten movements not written." What does "ten movements" mean? No one has explained it.

Although the Mawangdui texts do not directly mention the "nine shallow and one deep method", they refer to "ten movements" or "ten completed", stating that "ten movements: start with ten, then twenty, thirty, forty, fifty, sixty, seventy, eighty, ninety, one hundred", meaning that each ten strokes counts as "one movement", accumulating to a hundred. [Note: "one hundred" is a term for abundance, not a literal reference, but an extreme expression of quantity]. It can be seen that every ten strokes serve as a beat, and the so-called "nine shallow and one deep" refers to the division of this beat. However, there is a question here: how are "shallow" and "deep" defined?

The most important work for solving this problem is Gao's "Su Nu Miao Lun: Qian Shen Pian". It mentions "there are eight names in the female yin, also known as the eight valleys", along with the term representing the clitoris, totaling nine.
1) Red ball (clitoris);
2) String (one inch deep in the shadow);
3) Rhombus (wheat) teeth (2 inches deep in the negative);
4) Tuo Xi (three inches deep in the shadow);
5) Xuan Zhu (four inches deep in shadow);
6) Grain (five inches deep in the shade);
7) Yuque (Yin depth six inches);
8) Kun Hu (Stone) (Yin Shen seven inches deep);
9) Arctic (eight inches deep in shadow).

The regulations are: a depth of one to three inches is considered "shallow", four to six inches is "deep", and seven to eight inches is "too deep" [Note: "inch" refers to "finger length", approximately 2 centimeters; here, eight inches refers to dividing the vagina into eight segments]. Based on this, we can attempt to restore the reference in "Fang Ne" regarding "women have nine palaces":
1) Clitoris;
2) String (one inch deep in the shadow);
3) Wheat teeth (2 inches deep);
4) Yu Mouse (Three inches deep in darkness);
5) Infant girl (four inches deep in the yin);
6) Grain (five inches deep in shade);
7) Stinking rat (six inches deep in the dark);
8) Kun Stone (Yin Shen Seven Inches);
9) Zhongji (Yin Shen Eight Inches). Further up, there are similar terms in the texts of Mawangdui. For example, at the end of the "Yangsheng Fang" volume, there is an attached illustration that can be referred to as the "Pin Hu Tu", which is used to depict these areas (but as a flat diagram). It is evident that there is a significant consistency in this regard.