A story has it that when in Chang An, Lü was tested by Zhongli Quan ten times before Quan took him in as a disciple and Lü subsequently became immortal.
These ten trials are described below.

One day Lü came back from work and found out that his loved one was dying; without sadness or remorse, he started to prepare the dress and coffin necessary for burial, but later his loved one revived and lived on.
Lü was still without sadness or joyous feeling.

Lü was selling goods at a market and there came a buyer to bargain with him.
After agreeing on the price, Lü handed him the stuff but the buyer refused to pay in full and then walked away.
Lü would not argue and let him walk away.

On the first day of the lunar calendar, Lü met with a beggar.
After giving him some money, the beggar kept asking for more and threw vulgar words at him.
Lü left the scene with a smile.

Lü was once a shepherd.
During his tenure a hungry tiger was eyeing the goats under his care.
Lü protected the goats by sending them down to the hillside and stood in front of the Tiger.
The hungry tiger was awed to see this and left without hurting Lü.

Lü was studying at a small hut on a mountain when a beautiful woman came by and asked if she could stay there for the night since she was lost.
That night, this beautiful lady was flirting and tried to get Lü to have sex with her, but Lü was untouched by such temptation.

One day Lü came back to his house and saw that he had been burglarized and lost all his belongings.
Without becoming angry he started to work on his farm.
As he dug into the ground he found countless pieces of gold.
He uncovered the earth without taking a single piece of the gold.

Lü bought some bronze utensils at a market.
Upon returning home he realized that all of the utensils were made of gold and he immediately returned them to the seller.

A crazy Taoist was selling medicine on the street, telling people that his magic potion would have one of two outcomes: either 1) the drinker would die on the spot, or 2) the drinker would become immortal.
No one would dare to try, except Lü, who bought and tried the potion.
Nothing happened to him.

A river was elevated due to heavy rain.
Lü and other passengers were on a boat crossing the river.
Before reaching the middle of the journey, the weather deteriorated, and most of the passengers except Lü became worried.
Lü took it in his stride and never worried about life and death!

Lü was alone at home and suddenly weird things happened.
Ghost and monsters were killing each other and wanted to do the same to Lü.
Showing no sense of fear, Lü kept on doing his chores without paying attention to them.
Another group of devils with blood all over them tried to take Lü's life away by saying to Lü that he owed his previous life to them since in past life Lü took his life.
Without any fear Lü said ‘go ahead and take my life since I took yours in past life, this is fair and square !’
All of a sudden the sky turned blue and those ghost and devils disappeared.
 Zhongli Quan  (Who happened to be his Teacher and Mentor in Taoist stories) was looking and laughing at him while all these events were happening.

These 10 tests proved that Lü was a pure and dignified person and Master Zhongli was very satisfied and happy to take Lü to Nan San Her Ling to pass his secret to life and subsequently formed a "Zhong-Lü Golden Dan" school of Taoism.
But Lü was not too fond of the secret and instead changed his formula for inner peace and benefits more human beings; many until today practiced such path to immortals.
This is his major effort and contribution.
He is said to have helped many to walk the right path and improve the health and living conditions of many people.
A story has it that when in Chang An, Lü was tested by Zhongli Quan ten times before Quan took him in as a disciple and Lü subsequently became immortal. These ten trials are described below.
One day Lü came back from work and found out that his loved one was dying; without sadness or remorse, he started to prepare the dress and coffin necessary for burial, but later his loved one revived and lived on. Lü was still without sadness or joyous feeling.
Lü was selling goods at a market and there came a buyer to bargain with him. After agreeing on the price, Lü handed him the stuff but the buyer refused to pay in full and then walked away. Lü would not argue and let him walk away.
On the first day of the lunar calendar, Lü met with a beggar. After giving him some money, the beggar kept asking for more and threw vulgar words at him. Lü left the scene with a smile.
Lü was once a shepherd. During his tenure a hungry tiger was eyeing the goats under his care. Lü protected the goats by sending them down to the hillside and stood in front of the Tiger. The hungry tiger was awed to see this and left without hurting Lü.
Lü was studying at a small hut on a mountain when a beautiful woman came by and asked if she could stay there for the night since she was lost. That night, this beautiful lady was flirting and tried to get Lü to have sex with her, but Lü was untouched by such temptation.
One day Lü came back to his house and saw that he had been burglarized and lost all his belongings. Without becoming angry he started to work on his farm. As he dug into the ground he found countless pieces of gold. He uncovered the earth without taking a single piece of the gold.
Lü bought some bronze utensils at a market. Upon returning home he realized that all of the utensils were made of gold and he immediately returned them to the seller.
A crazy Taoist was selling medicine on the street, telling people that his magic potion would have one of two outcomes: either 1) the drinker would die on the spot, or 2) the drinker would become immortal. No one would dare to try, except Lü, who bought and tried the potion. Nothing happened to him.
A river was elevated due to heavy rain. Lü and other passengers were on a boat crossing the river. Before reaching the middle of the journey, the weather deteriorated, and most of the passengers except Lü became worried. Lü took it in his stride and never worried about life and death!
Lü was alone at home and suddenly weird things happened. Ghost and monsters were killing each other and wanted to do the same to Lü. Showing no sense of fear, Lü kept on doing his chores without paying attention to them. Another group of devils with blood all over them tried to take Lü's life away by saying to Lü that he owed his previous life to them since in past life Lü took his life. Without any fear Lü said ‘go ahead and take my life since I took yours in past life, this is fair and square !’ All of a sudden the sky turned blue and those ghost and devils disappeared.  Zhongli Quan  (Who happened to be his Teacher and Mentor in Taoist stories) was looking and laughing at him while all these events were happening.
These 10 tests proved that Lü was a pure and dignified person and Master Zhongli was very satisfied and happy to take Lü to Nan San Her Ling to pass his secret to life and subsequently formed a "Zhong-Lü Golden Dan" school of Taoism. But Lü was not too fond of the secret and instead changed his formula for inner peace and benefits more human beings; many until today practiced such path to immortals. This is his major effort and contribution. He is said to have helped many to walk the right path and improve the health and living conditions of many people.
Lü Dongbin