Chapter 24-The First Biography of Taiji Rouke just said, "The internal skills of Jiuyang Shen Gong and Shaolin Sect have reached the highest level, so it can be said that it is difficult to compete." The "internal skill of Shaolin Sect" here should refer to Yijin Sutra, otherwise the internal skill of Shaolin can't compare with the magical skill of Jiuyang. It's just that Yijinjing is the achievement method of Buddhism. It pays attention to the exploration of "I am in harmony with others" and has high requirements on mind, so there is no desire to win in my heart, so few people practice it. It's easy for people with martial arts obstacles like Jiu Mo Zhi to practice all their lives, but once they practice, they will make great achievements. It seems that the threshold for practicing Jiuyang magic is much lower. Anyone can practice, even those who listen like Wuse, Guo Xiang and Zhang Sanfeng, and there are no adverse consequences. It is hard to imagine that the Book of Changes can do the same. However, the disadvantage is that the power is not necessarily great after practice. Zhang Wuji's strength was only three or four points after his first practice. Later, the dragon and tiger met in a bag of dried Kun, but such an adventure cannot be copied. Both are the best internal skills in the world, and can be used in martial arts after practice. After practicing Yijin Jing in Tan Zhi, you can draw some simple star kung fu with Xiao Feng. After Zhang Wuji's practice, he fought in Guangmingding. Now, the public is learning Kung Fu and selling it to all factions, which is worse than the masters of all factions. However, Zhang Junbao and Guo Xiang can set up their own schools after listening to part of the magic of Jiuyang. From this point of view, Jiuyang is better than Yijinjing.

In the newly revised version, Zhen Jing, the author of Jiuyang, and Wang Zhongyang fight for wine and discuss martial arts. After winning Wang Zhongyang, they can borrow Jiuyin Zhen Jing at a glance. Realizing that Yin Qi was too heavy, he hid in Shaolin, and secretly wrote his own "Harmony of Yin and Yang and Nine Yang True Classics" between the four volumes of Shurangama Sutra, which was handed down to later generations.

It can be seen that Jiuyang Zhen Jing is to contain Jiuyin Zhen Jing.