Cheng Siyuan has very elegant tastes and hobbies. When he was in Beijing, he lived in the deep house compound where Liang Shi and Qian Changzhao lived, but his furniture and other supplies were simple and simple. The decorations in his house are mainly calligraphy and painting and flowers. The four walls of his study are all books, and only one side is used for lighting. There are many exquisite brushes and seals on the case, and books have been published, such as Mr. Li Zongren's Later Years, Biography of Bai Chongxi and Zheng Hai's Secret Luck. Cheng Siyuan finds time to practice calligraphy every day, not only writing books, but also practicing Dan Xin, which can eliminate fatigue, improve intelligence and prolong life.

Keeping a moderate and regular life, going to bed early and getting up early, not overeating and not drinking hard liquor is also one of Cheng Siyuan's fitness methods. It is said that he had contact with Zhang when he was in Hong Kong in the 1940s. They play cards, sometimes late into the night. At this time, a friend advised Cheng: "Be careful with things!" After that, he "quit".

Cheng Siyuan, a native of Guangxi, usually likes to eat meat and shrimp, followed by cheese and tremella, while vegetarian food and vegetables are relatively rare. Although this eating habit is not reasonable enough, he makes up for it by "eating less and exercising more"

Swimming is one of Cheng Siyuan's favorite sports. He likes to fight with water and waves in wide waters. Cheng Siyuan used to swim with Chairman Mao, who praised him for "swimming well"! He said that he likes breaststroke best, because breaststroke just exercises the heart and lung function when the head enters the water, which can prevent heart and lung diseases.

"Combination of motion and static" is Cheng Siyuan's way of keeping in good health. Every day, except jogging in the yard, Cheng Siyuan stays at home and reads newspapers and periodicals. He especially likes reading history books such as Twenty-four History and History as a Mirror. He thinks that history books are like a mirror, which makes people smart. Optimism and humor are Cheng Siyuan's magic weapons for fitness.