Since the Northern Song Dynasty, there have been many stories and legends that are connected to Lü Dongbin.
The stories were usually about Lü helping others to learn the Tao.
According to the official History of the Song Dynasty (宋史), Lü was seen several times visiting the house of Chen Tuan (陳摶), who was believed to be the first person to present to the public the Taijitu.

The kindness of Lü Dongbin is demonstrated in the Chinese proverb "dog bites Lü Dongbin" (狗咬呂洞賓 gŏu yăo Lǚ Dòngbīn), which means an inability to recognize goodness and repay kindness with vice.
Some say that the original proverb should actually be "狗咬呂洞賓，不識好人心," stemming from a story about the friendship between Gou Miao (狗咬) and Lü Dongbin, who both did for the other great favors, each of which seemed like a disservice initially, signifying the importance of having faith in one's friends.
 This story is not substantiated, because Gou Miao is not mentioned in any classical text, and only popularized on the Internet.

According to Richard Wilhelm, Lü was the founder of the School of the Golden Elixir of Life (Jin Dan Jiao), and originator of the material presented in the book "Tai Yi Jin Hua Zong Zhi" (太一金華宗旨), or The Secret of the Golden Flower.
Also, according to Daoist legend, he is the founder of the internal martial arts style called "Eight Immortals Sword" (八仙剑), considered to be one of the martial treasures of Wudangshan.

According to one story, Lü's teacher Zhongli Quan became an immortal and was about to fly to heaven, while saying to Lü that if he kept practicing the Tao he would also be able to fly to heaven himself very soon.
Lü Dongbin replied to his teacher that he'll fly to heaven only after he enlightens all the sentient beings on earth (another story says all his relatives).
 According to the book "The Eight Immortals Achieving the Tao (八仙得道摶)," in his previous incarnation, Lü Dongbin was a Taoist master and the teacher of Zhongli Quan.

According to the Taoist book "History of the Immortals" (歷代神仙通鑒), Lü is the reincarnation of the ancient Sage-King "Huang-Tan-Shi" (皇覃氏).

According to Venerable Hsuan Hua, Lü is one of the transformations of Guanyin (Avalokiteśvara) Bodhisattva.
Since the Northern Song Dynasty, there have been many stories and legends that are connected to Lü Dongbin. The stories were usually about Lü helping others to learn the Tao. According to the official History of the Song Dynasty (宋史), Lü was seen several times visiting the house of Chen Tuan (陳摶), who was believed to be the first person to present to the public the Taijitu.
The kindness of Lü Dongbin is demonstrated in the Chinese proverb "dog bites Lü Dongbin" (狗咬呂洞賓 gŏu yăo Lǚ Dòngbīn), which means an inability to recognize goodness and repay kindness with vice. Some say that the original proverb should actually be "狗咬呂洞賓，不識好人心," stemming from a story about the friendship between Gou Miao (狗咬) and Lü Dongbin, who both did for the other great favors, each of which seemed like a disservice initially, signifying the importance of having faith in one's friends.  This story is not substantiated, because Gou Miao is not mentioned in any classical text, and only popularized on the Internet.
According to Richard Wilhelm, Lü was the founder of the School of the Golden Elixir of Life (Jin Dan Jiao), and originator of the material presented in the book "Tai Yi Jin Hua Zong Zhi" (太一金華宗旨), or The Secret of the Golden Flower. Also, according to Daoist legend, he is the founder of the internal martial arts style called "Eight Immortals Sword" (八仙剑), considered to be one of the martial treasures of Wudangshan.
According to one story, Lü's teacher Zhongli Quan became an immortal and was about to fly to heaven, while saying to Lü that if he kept practicing the Tao he would also be able to fly to heaven himself very soon. Lü Dongbin replied to his teacher that he'll fly to heaven only after he enlightens all the sentient beings on earth (another story says all his relatives).  According to the book "The Eight Immortals Achieving the Tao (八仙得道摶)," in his previous incarnation, Lü Dongbin was a Taoist master and the teacher of Zhongli Quan.
According to the Taoist book "History of the Immortals" (歷代神仙通鑒), Lü is the reincarnation of the ancient Sage-King "Huang-Tan-Shi" (皇覃氏).
According to Venerable Hsuan Hua, Lü is one of the transformations of Guanyin (Avalokiteśvara) Bodhisattva.
Lü Dongbin