Pick cotton, send taro ghost, Dong He, which solar term is it? Well, I can't finish my homework.

There is a custom of "sending taro ghosts" before the first frost in Gaoming District, Guangdong Province. The picking season of cotton varies from place to place. For example, the cotton picking season in the Yellow River basin is usually in July and August, while in the middle and lower reaches of the Yangtze River, it is usually between July and September. In addition, the picking season of cotton in Xinjiang is in September.