These four major production areas are located in the area from Guifeng Mountain to Gudou Mountain in Xinhui, where the two rivers converge, the salty and salty junction, the soil is fertile, the water source has high content of organic matter, and the climate is temperate, so that the quality of the Chenpi produced is greatly superior to that of ordinary Chenpi.

In which, Tianma production area most reasonably retains the original ecological environment, very conducive to the growth of citrus trees; Meijiang production area is at the junction of the estuary, in the high tide, the sea water will submerge the more low-lying areas, the salty and fresh water mingling, fertile soil; Chakeng production area more than seven hundred years ago a large number of cultivation of Xinhui mandarin orange, where Chenpi mellow and fragrant; Dongjia in the history of the famous Xinhui mandarin orange planting bases, but also the Dongjia is historically a famous Xinhui mandarin planting base, and it is also the production area of Circle Branch mandarin.