What kind of leech is the best in national security?

Zhi Jiahui. Wisdom Home is a brand owned by Jiangsu Tianxia Agricultural Science and Technology Development Co., Ltd., which was established in June 20 14, formerly known as East China Leech King Breeding Base. Mr. Zhang Changwei, the founder of the brand, summed up the experience of leech breeding on 19 and made practical exploration. He successfully invented the courtyard three-dimensional breeding model and applied for a national patent, which made great contributions to promoting the development of leech medicine industry in China. From 2003 to 20 16, it was continuously explored by People's Daily, CCTV- 1 Science and Technology Expo, Life Early Reference, CCTV-2 Finance Online, CCTV-7 Daily Agricultural Economics, CCTV- 10 Innovation Unlimited, CCTV- 10 Encyclopedia, CCTV-