
Since the image is in Chinese, I believe that I keep it to its originality because I'm afraid that editing it will mess up with the intricate pictorial details that are currently present. Instead, I will provide a detailed explanation to the different legends in here:
Both legend scales(the horizontal line strip and the Piesces symbol) on the top role indicate the Rice Paddy Distribution
Both scales on the middle row (the vertical line and the t symbol) indicate Wheat Distribution
Both Scales on the bottom row (the row of light dots and the single bold, solid dot) indicate corn, millet, sorghum and other possible crops in China)
Category
Level
Geographic Area