The history of Luogang cultivation of sweet orange is very long. It has been cultivated since the Han Dynasty and has a history of more than 500 years. The famous scholar and poet Qu Dajun, who was known as the "Guangdong Xu Xiake" in the late Ming and early Qing dynasties, described this in "Guangdong New Language": "From Xiaokeng, Huocun to Luogang, three or forty miles, many flowers and fruits are the industry... One acre per field, four or fifty strains of citrus...".

Luogang sweet orange quality technical requirements 1, the variety of dark orange. 2. Site conditions The soil type is red soil and the soil texture is sandy loam. The pH value is 5.5 to 6.5, the thickness of the soil layer is ≥ 50 cm, and the organic matter content is ≥ 1.5%. Third, cultivation management Seedling cultivation: choose red lemon, red orange or sour orange as the rootstock, graft and propagate seedlings. 2. 3. Fertilizer and water management: based on organic fertilizer, ≥9 tons of fertilized organic fertilizer per hectare per year, and irrigation is prohibited within 10 days before harvesting. 4. Environmental and safety requirements: The use of pesticides, fertilizers, etc. must comply with relevant national regulations and must not pollute the environment. 4. The fruit harvesting period is from late November to mid-December, and the fruit is harvested after the dew is dry in non-rainy days. V. Quality characteristics 1. Sensory features: fruit oval or nearly spherical, peel orange red to orange yellow, thin, shiny; fruit top has a circular ring; flesh crisp, slag, sweet flavor, osmanthus fragrance. 2. Safety and other quality technical requirements: Product safety and other quality technical requirements must comply with relevant national regulations.

Apply to：
The producers of Luogang Orange's production area may apply to the Quality and Technical Supervision Bureau of Luogang District, Guangzhou City, Guangdong Province for the use of the “Special Mark for Geographical Indication Products”, which shall be submitted to the General Administration of Quality Supervision, Inspection and Quarantine by the Guangdong Provincial Bureau of Quality and Technical Supervision. Announced after approval. The statutory testing agency of Luogang Orange is designated by Guangdong Quality and Technical Supervision Bureau.