Chinese gem optical - electronic components of the professional Cong R & D, manufacturing, sales service. Main Products: lenses (phone window, lens, camera lenses, all kinds of decorative lenses, UV transfer panel, various panels, etc.), the key class (acrylic crystal buttons, PC ultra-thin keys, UV Transfer button ). After years of development, was more than a dozen well-known mobile phone manufacturers to establish a good working relationship. The main ...