According to textual research, Gonggan originated from Zhenshan, Sihui City, Guangdong Province, and it is an excellent and rare variety for farmers. Planting has a long history. According to legend, as early as the Tang Dynasty, tribute oranges were planted in Sihui and Deqing. During the Northern Song Dynasty (96 -1127 AD), it was listed as a tribute for the emperor by the court because of its excellent quality, hence the name "Gonggan". However, before the early 199s, Gonggan was only planted on a small scale as a local specialty. Since the mid-199s, according to the market demand, the county party committee and government of Deqing seized the opportunity to develop the production of tribute oranges and built the first large-scale production base of tribute oranges. In 27, the cultivation area of Deqing tribute oranges was 8,2m2, and the output was about 7, t.. Deqing County was awarded the title of "Hometown of Gonggan in China Economic Forest China" in 24, and in the same year, it was awarded the "Certificate of Geographical Origin of Gonggan" by the State Quality Supervision Bureau. Deqing Gonggan was awarded the titles of "Famous Fruit in China" and "Famous Brand Product in Guangdong Province" successively, and was approved as "Certificate of Origin Registration Trademark" by the State Trademark Office.