What solar terms eat watermelon?

According to legend, during the Ming Dynasty, many people in Nanjing suffered from dysentery and sores one year. Some people follow the example of Cui Xianggong's daughter in Luzhou to eat melons and let dysentery heal itself. As a result, a custom gradually formed. In Qiu Lai, every household eats watermelon every year, which is called "eating autumn".

Watermelon was introduced into the Central Plains from the Western Regions, and the northwest just entered the picking period around beginning of autumn, so it is an early adopter to eat watermelon in beginning of autumn. This custom influenced the south of Qing Dynasty. Since autumn, watermelons from Jiangsu, Zhejiang and Shanghai have entered the final market. There are various explanations for why beginning of autumn eats watermelon. It is said that eating watermelon in beginning of autumn can eliminate the stagnation of qi accumulated in summer, and some people say that eating watermelon in beginning of autumn can accumulate "yang" for winter.