Which plain is bigger, Guigang, Guangxi or Changde, Hunan?

Guigang Plain in Guangxi has a large area. Baidu map information shows that the plain area of Guigang City in Guangxi accounts for 75.06% of the city's total area, and it is a region dominated by plains, while the terrain of Changde City in Hunan Province is dominated by hills and mountains, and the plain area is small, accounting for less than 20% of the city's total area, so the plain area of Guigang City in Guangxi is larger than that of Changde City in Hunan Province. Guigang City is located in the southeast of Guangxi, the middle reaches of Xijiang River, the trunk line of the Pearl River Basin. It governs Guiping City, Pingnan County, Gangbei District, Gangnan District and Tantang.