Taihu Lake Basin, Sichuan Basin and Pearl River Delta are collectively called the three famous sericulture bases in China. \ x0d \ 1。 Taihu Lake Basin: Taihu Lake Basin is the largest sericulture base in China. It mainly includes Hangzhou (Prefecture), Jiaxing (Xing) and Lake (Prefecture) areas in Zhejiang Province and areas around Taihu Lake in Jiangsu Province. The climate here is mild, the frost-free period can reach 250 days, mulberry leaves can be harvested three times a year, and spring silkworms and autumn silkworms can be raised at least twice a year and up to four times, namely, spring silkworms, summer silkworms, autumn silkworms and late autumn silkworms. The sericulture industry is developed here, and the silk weaving industry has a long-standing reputation. Nanjing's brocade, Suzhou's embroidery, Hangzhou's cotton weaving and Huzhou's lake silk are all famous at home and abroad. \ x0d \ 2。 Sichuan Basin: Sichuan Basin is the second largest sericulture base in China, mainly distributed in Jialing River Basin and the middle and lower reaches of Fujiang River. Sericulture covers more than 50 counties in Sichuan Basin/Kloc-0, accounting for about 70% of the whole province. The climate in Sichuan Basin is warm and humid, with a frost-free period of more than 275 days. Mulberry trees can raise silkworms three or four times a year. Now the sericulture here has developed to hilly areas, and the prospects are extremely broad. Shu Brocade and Ba Satin, which are famous all over the country, are here. \ x0d \ 3。 Pearl River Delta "The sericulture bases in the Pearl River Delta are mainly located in Shunde, Nanhai, Zhongshan and other counties in Guangdong Province. Mulberry orchards account for about 75% of the total area of mulberry orchards in Guangdong Province, and cocoon production accounts for about 90% of the total cocoon production in Guangdong Province. Shunde is the most famous county here, and the sericulture output accounts for about 1/2 of the total sericulture output in the province. The Pearl River Delta is located in the south of the subtropical zone, with a frost-free period of 350 days throughout the year. Mulberry leaves can be picked seven or eight times a year, and silkworm rearing can reach seven or nine times, which is far behind the other two silkworm bases. The silk weaving industry here is also very developed. Xiangyun yarn, vinyl yarn and Guangzhou Cantonese embroidery produced in Foshan are all famous.