Founded in 1999, Tianjin Youth Technology Development Co., Ltd. is the first high-tech company that engages in the R&D, production of cartridge refilling machines, and chain-store operation in China and is also one of few national level high-tech companies. Now, our company is the sole enterprise in China that can produce cartridge testers with printing function. We have got support and fund from China government to develop and design new products. We have several National grade engineers of State Department and have established long-term cooperation relationship with Tianjin University,...