Bei Zhangshi's self-discipline is mainly manifested in these two aspects, namely, self-discipline in life and self-discipline in work. Even at a very old age, Mr. Bei Lao still maintains a stable attitude towards work and life and a regular life schedule, which is worth learning.

Second, moderation.

Temperance is the diet of Mr. Bei Lao. He has always kept a light diet, and he can control himself well for big fish and meat, and eat as little as possible. Mr. Bei Lao can still maintain a good physical condition in middle age, which is definitely inseparable from his "moderate" eating habits.

Third, make friends.

Mr. Bei Lao likes to make friends with young people and fashionable and energetic young people, which makes him feel young and energetic physically and mentally. This is also the secret of Academician Bei Zhangshi's life.

Fourth, exercise.

Mr. Bei Lao is a person who likes sports. He has been exercising for decades, and there is no complicated exercise method, just walking. Mr. Bei Lao said that walking is the best way to exercise, and retiring at home can guarantee to walk 8000 steps every day. He also massages himself, slaps muscles, relaxes muscles and promotes blood circulation.

Fifth, happiness.

Mr. Bei Lao thinks happiness is very important, and the above four cores are also happiness. He also maintains a happy attitude for his way of keeping fit. I believe that the healthy spirit of Mr. Bei Lao can not be separated from his good attitude.