When Xu Chaoyang was twelve years old, he picked up a six-year-old child from the flood. The child was covered in mud and water and hid in his arms and said, "Help me."
From then on he became an older brother.
Later, Chen Zhao became critically ill and Xu Chaoyang disappeared. He left a letter: "Let's clear up the two parties."
From then on he disappeared from the world.
Reunited after a long absence, Chen Zhao is already a top student in medical school, and Xu Chaoyang is a car repairman covered in engine oil in the Gobi Desert.
Purpose: Live well and live hard