Silkworms are seen at a silkworm breeding base of Cathaya Group in Xiajiang Village of Chun'an County, east China's Zhejiang Province, May 9, 2018. Chun'an County cooperated with Cathaya Group in building silkworm breeding bases to produce high quality cocoon and silk products. To date, about 4,000 hectares mulberry bushes have been cultivated and some 300 tonnes raw silk are produced per year. (Xinhua/Weng Xinyang)