Bite the ring and plant grass to repay the kindness. Biting the ring and grass is an ancient legend of gratitude, which comes from Zuo Zhuan. The former is about a scholar-bureaucrat who married his father's concubine alone in order not to be martyred. The father of the dead concubine thanked his daughter for the tangled weeds on the ground and tripped over the benefactor's opponent. The latter said that a child saved the life of a trapped yellowbird, and the yellowbird got four white rings, claiming that this ring could make the benefactor's children white for generations and occupy a high position. After that, the two allusions are combined into one sentence, which means that if you are loved by others, you will get good results, and life and death will remain the same. Feng Menglong in Ming Dynasty wrote in Awakening the World: Your great kindness is not reported, but engraved in your arms. Title ring grass, life and death do not bear.

When Han Xin was a teenager, his family was poor and his parents died. Although he studies hard and practices martial arts hard, he still has no life. As a last resort, he had to go to other people's homes to eat for free, which was often ignored by others. Han Xin swallow not to descend this tone, went to the Huaihe River to fish, fish for food, and often had a hearty meal. There is an old woman who washes yarn wadding for others by the Huaihe River. She is called "floating mother". Seeing Han Xin's pity, she gave him her own food. Every day, without interruption. Han Xin was deeply moved. Han Xin, who was named the marquis of Huaiyin, never forgot the kindness of his wandering mother, sent people to look around and finally gave it to him as a gift.

During the Spring and Autumn Period, Yu Boya was good at playing strings, while Zhong Ziqi was good at listening to sounds and distinguishing meanings. On one occasion, Boya traveled to the north of Mount Tai (now Guishan in Hanyang, Wuhan) and was caught in a rainstorm, hiding under a rock. When he is lonely, he takes out his guqin and plays it. Zhong Ziqi, a woodcutter who also sheltered from the rain nearby, couldn't help crying, "Good song! What a beautiful song! " Later, every time Boya played a piano piece, he could hear its meaning and interest in the early stage, which surprised Boya. So they became bosom friends and made an appointment to meet again next year to discuss the piano. But when Boya came to the meeting the next year, he learned that the little chef hippo had died of illness not long ago. Boya lamented his sadness and broke the guqin. From then on, she stopped playing the strings to thank her for her rare bosom friend.

A scholar dies for a bosom friend. This sentence was said by Yu Rang, a famous assassin in the State of Jin at the end of the Spring and Autumn Period, emphasizing gratitude. Because Zhi Bo, who was grateful to herself, was killed by Zhao Xiangzi, Jade Jean thought that "a scholar died as a confidant and a woman was complacent" and was determined to assassinate Zhao Xiangzi and avenge Zhi Bo. After the first attack failed, he rotted the corpse with lacquer sores, swallowed charcoal with a hoarse voice, and made the corpse look miserable, so that his wife didn't know, and then he looked for opportunities to get close to Zhao Xiangzi. The second assassination still ended in failure, but the arrested Yu Rang said, "A virtuous minister does not hide the beauty of others, but a loyal minister means death." He borrowed clothes from Zhao Xiangzi and asked him to cut a knife. Zhao Xiangzi took off his gorgeous clothes, and Yu let his sword leap, and then committed suicide.