He was thrown to the bottom of the cliff by Yue Buqun, and Lin Pingzhi happened to be eavesdropping outside the window near the cliff at that time. Therefore, the "Evil Sword Manual" discarded by Yue Buqun was stolen by Lin Pingzhi. The pick up came.
The origin of "Evil Sword Manual"
In the old version of "Swordsman", the authors of the Sunflower Book are a man and a woman, and the man's name contains the word "Kui" , and there is another word "flower" in the woman's name, which is the origin of "Sunflower Collection". In the Sunflower Book, it is divided into two parts, one for Qi training and the other for blood training.
This is easy to understand, just like the "Nine Yin Manual" in Jin Yong's "The Legend of the Condor Heroes". The Nine Yin Manual is divided into two volumes, one focusing on internal skills and the other on external skills. .
In the later new version of "Swordsman", Jin Yong made changes to the author of "Sunflower Collection". The author was changed from the original two men and women to a eunuch. This is also what we Jin Yong fans are most familiar with. Whenever we mention the author of the Sunflower Book, it is the eunuch of the former dynasty.
In the martial arts world built by Jin Yong in "The Swordsman", this Sunflower Book was only a fragmentary copy once it came out. Then, this Sunflower Collection was hidden in the Sutra Pavilion of Southern Shaolin. A book of martial arts secrets was lying there, and naturally there were many people who cared about it, including two people from the Huashan sect, Yue Su and Cai Zifeng.
The Huashan Sect and Shaolin still have some connections, and their relationship is not bad. The Huashan faction used their visit to Southern Shaolin as a pretext to secretly learn the remains of the Sunflower Book. We call the Sunflower Book that Yue and Cai secretly learned a copy of the Sunflower Book.
Later, Southern Shaolin learned that the Huashan sect secretly learned the Sunflower Book. Not only did they not blame it, they also sent a person from Du Yuan to persuade Yue and Cai that they could not practice the Sunflower Book.
Together, Yue and Cai are not allowed to practice, but we insist on practicing. Duyuan himself has been in Southern Shaolin for so many years and has never had the opportunity to study the Sunflower Book. Today he just took this opportunity to communicate with Yue and Cai. During the exchange, Du Yuan made another photocopy of the Sunflower Book.
When we arrived at Duyuan, we found that this Sunflower Book was incomplete for the third time. In other words, Duyuan’s Sunflower Book was not as good as the Sunflower Book of Yue and Cai, let alone the Sunflower Book of Duyuan. The fragment of the Sunflower Book in the Sutra Pavilion.
However, this Duyuan is smarter. After getting the fragment of the Sunflower Book, he cleverly changed his name. This is equivalent to copying someone else's stuff and then applying for a patent, and also... He gave the patent he had just applied for a resounding name—Seventy-two Ways of Evil-Repelling Sword Techniques. This is the origin of the sword technique to ward off evil.
Extended information:
After Du Yuan returned to secular life, he also gave himself a name - Lin Yuantu. This Lin Yuantu is Lin Pingzhi's great-grandfather in Jin Yong's "Swordsman". The Sunflower Book practiced by Dongfang Bubai was snatched from the hands of Yue and Cai after the people from Heimuya attacked Huashan.
From this point of view, the Sunflower Book and the seventy-two evil sword techniques in "The Swordsman" are both part of the Sunflower Book. In comparison, the Sunflower Manual practiced by Dongfang Bubai is superior to the Lin family's evil sword manual.