Miraculous Medical System, Starting with a Lawsuit?

After traveling through time, Ling Feng was inexplicably bound to a miracle doctor system, but at the beginning, an old man came to his door. He said that taking medicine can kill people. Lin Feng didn't expect that he had just traveled through time and was bound to the miracle doctor system, but at the beginning he had to file a lawsuit himself. The introduction is weak, please read the text. If you don't like it when you write a novel for the first time, you can tell me This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.