 This study examined the changes in vegetation cover and three different types of dry valleys in southwest China over a period of 20 years. The researchers found that the dry valleys experienced a decrease in vegetation cover due to a decrease in precipitation. Additionally, they observed an increase in vegetation cover in some dry valleys due to increased precipitation. This study suggests that understanding the effects of precipitation on vegetation cover in dry valleys is important for effective ecological restoration management. This article was authored by Qin Kun Guo, Rong Huo Zhong, Ji Jia Shan, and others.