On a rainy night, Cheng Yan was hit by a luxury car while delivering his last order of anti-cancer drugs. He was injured when he delivered the goods, but the customer complained and fined him 500 yuan. The hospital found a fractured right leg and early-stage leukemia, and the treatment cost was 300,000 yuan. In despair, he received a notice that his sister Cheng Xue was critically ill - the pharmaceutical company had stopped supplying the sky-high price of the drug "Blue Oxygen".
