Gonggan is a natural hybrid of orange and tangerine. It has the dual advantages of orange and tangerine. It is a rare farm citrus variety in Zhaoqing, Guangdong. It was awarded the "Chinese Famous Fruit" GG Chinese Mandarin by the China Fruit Distribution Association. It has important economic value. The pure tribute tangerine has beautiful fruit shape, golden color, thin skin and few cores, crispy flesh, sweet and fragrant honey, high sugar and low acidity, and rich flavor. It contains orange Deqing is the main origin of tribute tangerines, with its beautiful appearance and tender flesh and easy peeling. It has the honorary title of "The Hometown of Gong tangerines in China"

Gong tangerines are also known as "Emperor tangerines". ". According to research, tribute tangerine originated from Zhenshan, Sihui City, Guangdong Province. It is a rare variety among farmers. It has a long history of planting. According to legend, tribute tangerine was planted in Sihui and Deqing in the Tang Dynasty. During the Northern Song Dynasty ( 960-1127 AD) due to its excellent quality, it was listed as a tribute for the emperor by the imperial court, hence the name "Gonggan". The skin color is orange-yellow to orange-red, the skin is thin and juicy, the flesh is crisp and tender, refreshing and stale, sweet and low-acid, and has a unique flavor. However, before the early 1990s, tribute tangerine was only regarded as a local specialty. Since the mid-1990s, the Deqing County Party Committee and the county government have seized the opportunity to vigorously develop tribute tangerine production and built the first large-scale tribute tangerine production base in 2007. The citrus cultivation area is 8,200 hm2 and the output is about 70,000 tons. In 2004, Deqing County was awarded the title of "Hometown of Tribute Oranges in China" by the China Economic Forestry Association. In the same year, it was awarded the "Tribute Orange Origin Regional Product Certification" by the State Administration of Quality Supervision. '; Deqing Gonggan has won the titles of "Chinese Famous Fruit" and "Guangdong Province Famous Brand Product". In June 2007, Sihui City's "Sihui Gonggan" was approved by the State Trademark Office as a "registration certification mark of origin".