The silkworm cocoon industry in Hai'an has a long history of development and has gone through three steps. Every step has achieved remarkable results. The first step is to develop silkworm cocoon. In the 1960s and 1970s, more than a dozen silk and silk weaving enterprises have emerged in the county.

Since the 1980s, the amount of silkworms produced in Hai'an County and the yield of silkworm cocoons have been the first in the province for 23 consecutive years. In 2001, it caught the impact of the national silkworm cocoon market. At present, the area of ​​mulberry garden is nearly 200,000 mu, and more than 100,000 farmers have benefited from planting mulberry sericulture and become the first county of silkworm pupa in China. The second step is to develop the silk industry. The rich resources of silkworm cocoons have laid a good foundation for the development of silk industry in Hai'an. The silk textile industry has continued to grow and develop, forming a relatively complete silk processing chain. Hai'an Silk Group, a leading agricultural industrialization enterprise, established a community of interests with the base, and explored the development path of “company + factory + farmer” 茧 silk trade, industry and agriculture integration. Hai'an County is known as the “Hometown of Chinese Silk”. The third step is to develop the textile and garment processing industry. The development of the silk industry has incubated many textile and garment processing enterprises. A number of well-known enterprises with large scale and advanced technology and equipment, such as Hailin Group, Jiangsu Lianfa Group and Jiangsu Shuanghong Textile, have emerged rapidly. Textile categories have expanded to include cotton textiles, yarn-dyed, knitted, chemical fiber, silk, and garments. Some silk textile apparel brands stand out, “Hailin” brand underwear is rated as China's top ten brand-name knitted underwear and provincial famous brand products; “Haian Tie-dye” is well-known in the world, and the needle-needle clothing is praised by foreign companies as “Oriental Treasures”; "Silkworm seed, white factory silk, silk series clothing, bedding and other products won the national and provincial famous brand products, "Xinyuan" brand silk won the "China International Silk Expo" gold medal. Hai'an County is known as the “hometown of needle-punch clothing” and “hometown of tie-dye clothing” and is recognized as “Jiangsu Textile Industry Base County”.

Technical requirements for quality of silkworm pupa in Hai'an. 1. Cultivation of mulberry trees 1. Variety of mulberry trees: selection of mulberry mulberry varieties such as Yu 71-1 and Husang 32. 2. Site conditions: soil sandy loam to clay loam, soil salinity below 2‰, organic matter content above 1.5%, pH 4.5 to 9.0. 3. Planting time: winter planting or spring planting. 4. Planting density: planting mulberry seedlings ≤ 18,000 plants / hectare. 5. Tree type: ≤10 effective branches per plant. 6. Fertilization: Apply organic fertilizer ≥80 tons per hectare per year. 7. Environmental and safety requirements: The use of pesticides, fertilizers, etc. must comply with relevant national regulations and must not pollute the environment. Second, silkworm rearing 1. Silkworm varieties: use one or two silkworm species. 2. Feeding time: spring silkworm from May 1 to June 10, summer silkworm from July 1 to July 31, autumn silkworm from September 1 to November 15. 3. Mulberry leaf conditions: the water content of mulberry leaves at the age of 1st is 82%±1%; the moisture content of mulberry leaves at the 2nd age is 79%±1%; the moisture content of mulberry leaves at the 3rd age is 77%±1%; 4 years old The water content of mulberry leaves was 82%±1%; the moisture content of mulberry leaves at the age of 5 was 76%±1%. 4. Small silkworm rearing: 1 year incubation temperature 28.5 °C ± 0.5 °C, relative humidity 95% ± 3%; 2 year breeding temperature 27.5 ° C ± 0.5 ° C, relative humidity 90% ± 3%; 3 age breeding temperature 26.5 °C ± 0.5 ° C, relative humidity 85% ± 3%. 5. Large silkworm rearing: 4-year breeding temperature 25 °C ± 0.5 °C, relative humidity 80% ± 3%; 5-year breeding temperature 24 ° C ± 0.5 ° C, relative humidity 70% ± 3%. 6. Captain: The box is automatically uploaded. 7. Picking: Picking up the silkworm on the silkworm for 6 to 7 days. Third, the fresh drying drying temperature ≤ 120 ° C, drying time ≤ 2 hours, drying to moisture content ≤ 12%. Fourth, the quality characteristics 1. Sensory characteristics: 茧 shape, thick layer, white, white, fluffy, no dirt. 2. Physical and chemical indicators: Hai'an silkworm silkworm physicochemical index project index hairpin silk yield (%) ≥ 33 Jieshu long (m) ≥ 710 clean (minutes) ≥ 95.00 clean (minutes) ≥ 92 million meters dry rough (times) ≤4.03. Safety and other quality technical requirements: Product safety and other quality technical requirements shall comply with relevant national regulations.

Apply to：
Producers within the production area of ​​Hai'an silkworm cocoon may apply to the Hai'an County Market Supervision Administration of Jiangsu Province for the use of the “Special Mark for Geographical Indication Products”, which shall be reviewed by the Jiangsu Provincial Bureau of Quality and Technical Supervision and reported to the General Administration of Quality Supervision, Inspection and Quarantine for approval. The inspection mechanism of Hai'an silkworm cocoon is selected by the Jiangsu Provincial Bureau of Quality and Technical Supervision in the inspection institutions that meet the qualification requirements.