The central sentence in the preface of "Chen Ting Tiantai Xueji" is "The road is dangerous, and the water is dangerous."
Due to academic failure and war, the author failed to realize his desire to travel around the world. Faced with the harvest of Chen Tingxue's trip, he lamented that he was too old to achieve his goal.
The author believes that scenic spots can make people's feelings, ambitions and knowledge go up a step. In addition, there should be something higher than "the help of mountains and rivers", that is, Confucius learns Confucianism and Taoism.
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