1, "always looking for one or two problems worth studying"; After leaving the academic environment, if you don't have one or two questions worth answering in your mind, it will be difficult to maintain your enthusiasm for learning.

2. "Cultivate more non-professional interests"; If we don't do "the closest thing to nature and power", it will be difficult to maintain the idealism of a life interested in knowledge. The best remedy is to develop legitimate interests and activities outside the industry.

3. "You should have confidence." Born in this unfortunate era, I can't see or hear anything but despair. Especially for those who graduated this year, when you see your country and nation sinking to such a low point.

4. When the world is just a force of the world, when you look at the horizon as if you can't see a glimmer of light, it's time to cultivate self-confidence. If you have faith, we still have hope of salvation.

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Maxima is common, but Bole is not. Universities are common, but there are few good presidents. The glory of Peking University in the history of modern education in China is different from that of Peking University, which once had more than one great president except Cai Yuanpei, and Hu Shi is well known.

This is the "self-protection prescription" he prescribed for the fresh graduates of 1932. Others may not love it, but in Hu Shi's view, this is his old belief. Two years later, he wrote another article with the same name, repeating what he had said earlier.

Twenty-eight years later,1June, 960, he gave a speech at the graduation ceremony in national cheng kung university, Tainan, promoting "three kinds of medicines" as self-defense prescriptions, and officially named these three kinds of medicines as Question Dan, Xi San and Xin Xin Tang in Hujiadian. He has made it clear that he wants college graduates to remember that they "went to college" and "left a trace".