Const Medical Co. Ltd YanJi was found in 2004, which is a medical equipment company cooperated by china and foreign countries. Since its foundation, the company strictly conforms to standard of ISO9001:2000 and ISO13485:2003. Relying on advanced scientific technology strength and having introduced abroad advanced and outstanding technique, the company develops a series of medical amiable consuming products such as blood collection pen, blood collection needle, and single-use automatic blood collection needle. The products have stable quality and good fame. At present, the company has developed into the production range of 30 million single-use automatic blood collection needle, 50 thousand blood collection pen, and 0.1 billion blood collection needle.