Sun Simiao, a famous doctor in Tang Dynasty, wrote four characters: Great Doctor and Sincerity.

You can also choose a famous saying from the book. For example, "Every big doctor should treat a disease with peace of mind, show mercy first, and then show mercy. He vowed to save the suffering with his spirit. If you have a disease, people who come to ask for help must not ask about his dignity, wealth, age, hatred and goodwill. Hua Yi's foolish friends, as close relatives, must not look back and forth, care for their luck, cherish their lives and see their distress. If he has his own heart, he won't avoid danger. If he is ill, he will be hungry and tired day and night, and he will.

In this paragraph, I once wrote a banner in the lobby of a Chinese medicine clinic.