When Uncle was 22 years old, his nephew needed a kidney transplant, and he donated a kidney to his nephew.

His brother and sister-in-law knelt on the ground to thank him for saving their lives, and the nephew vowed to take care of him in old age and death.
His parents wrote a will on the spot, leaving their inheritance to him. Although they didn't have much property.
Year after year passed, he was in his thirties, dating one person after another, but none worked out.
His parents scolded him, saying he was useless and cowardly. He said it was because he lacked a kidney, no woman would be with him.
His father threw the ashtray in anger and went to hold his great-grandson.
He was 45 years old and still hadn't found a wife. When his parents were gone, he fell ill and went to the hospital.
When his nephew came to take care of him, he felt he had done the right thing back then.
He was 50 years old, and his sister-in-law scolded him: "It's been 30 years, isn't that enough for paying back your life? You still have to serve him every day! Endless."
At 52, with uremia, he passed away.
His brother and sister-in-law said, "Finally he's gone, he only used one of his kidneys, endured for 30 years."
His nephew said, "We've been kind enough, how much does it cost to buy one?"