Spring, summer, Anqiu, Sui and Winter Jubilee mean: spring prays for your peace, summer hopes for your peace of mind, autumn hopes for your health, and cold winter nights hope for your expectation. To sum up, let's live up to our youth and enjoy the present. This is a common expression in letters, which is used to express the wishes of the four seasons to the recipients, that is, spring is auspicious, summer is safe and healthy, autumn is happy and healthy, and winter is auspicious. The phrase "Spring in Qi 'an, Summer in Autumn, Ear in East Xi" comes from China's ancient literary masterpiece "Master Zhuangzi". The master of keeping in good health is an article by Zhuang Zhou, a philosopher and writer in the Warring States Period, which is contained in Zhuangzi's Inner Chapter. This is an article about keeping in good health. The full text is divided into three parts.