Protective function, that is, not afraid of enemy violence. According to the introduction of China Wushu Circle, the human body has many weaknesses and fatal points, and the most fatal key part (especially men here) is the pudendum. In view of this, Shenzi Yanggong has specially created an excellent method to prevent the genitals from being hit, which is called "shrinking the tortoise and hiding the yin" in Wudang Taihe Gate terminology. This is the mysterious requirement of our ancient masters that "it is better to be lost than to be spread indiscriminately". At present, there are some superficial practitioners who only know fists and feet and don't know martial arts. They often say, "qigong practitioners can't get married." This statement is ridiculous. The so-called "can't get married" theory, explained by experts, essentially refers to practicing martial arts (here refers to the alchemy of Wudang Taihe Gate, such as the alchemy of plow bucket and the lock of kidney, etc. ), that is, people who have achieved certain accomplishments have already possessed the ability to "lock sperm and solid liquid", so although they are married, they still cannot sow in the woman's palace (Taoist Xuan is fertilization and pregnancy). However, if you become a kungfu practitioner, you can control your physiological functions at will. In a word, there are some mysterious but uncomfortable factors in the skill of "shrinking the tortoise and hiding the yin" in the kidney-child yang gong. Therefore, this part of the practice has been deleted to seek advantages and avoid disadvantages.