Did Nanyang harvest leeches?

Yes Nanyang, formerly known as Wan, is a prefecture-level city and sub-central city in Henan Province, where leeches are collected by accident. Its Nanyang leech farm is located in Tanghe, Nanyang, Henan. Leeches have been cultivated since 20 12. Through unremitting efforts, we have summed up a lot of successful aquaculture experience from many experiments, mastered a series of technical difficulties such as artificial seedling raising, artificial incubation, centralized intensive aquaculture, aquaculture water body management, disease prevention and control, and achieved considerable results.