Gong Tingxian, a famous doctor in the Ming Dynasty, lived to be 92 years old. He wrote "Poems on Nutrition", which is a set of scientific rules about "eating, drinking, having fun" summarized based on many years of practice in treating diseases and maintaining health. The full text of the poem is as follows:
Cherish your energy and preserve your essence to nourish your mind,
Think less and have fewer desires and don’t worry about it.
The food is only half-full and tasteless.
Don’t drink more than three minutes too often.
Make fun of every joke,
Always be happy and avoid being angry.
Don’t worry if Yanliang becomes deceitful,
Let me live happily for a hundred years.