Shimen is located in the hilly area from Wuling Mountain to Dongting Lake, with deep soil layer and rich nutrients, which is suitable for citrus growth. As a result, Shimen has become the largest production base of early-maturing tangerines in China. By the end of 2000, the planting area was 300,000 mu and the fruit output was 200,000 tons. It was recognized as "the first county of early-maturing tangerines in China" by the Citrus Society of China, so it was known as "the hometown of citrus".

Shimen is located in the hilly area from Wuling Mountain to Dongting Lake, with deep soil layer and rich nutrients, which is suitable for citrus growth. 1989 was rated as "national high-quality fruit" and won the title of national and provincial high-quality citrus for many times, which is deeply loved by consumers and has been in short supply. As a result, Shimen has become the largest production base of early-maturing tangerines in China. By the end of 2000, the planting area was 300,000 mu and the fruit output was 200,000 tons. It was recognized as "the first county of early-maturing tangerines in China" by the Citrus Society of China, so it was known as "the hometown of citrus".