1. Pass the quality authentication of the CD national project research center of Tsing-Hua University , Japanese Mitsubishi (Mitsubishi ). 2. Inner Circle serial number adopt laser shoot print, avoiding any fake products. 3. Keep data inerrability at scurviness environment.     3.1 Passing 80c , 80% , 175hrs environment test.     3.2 Passing the salt solution experiment (5% , 12hrs ), the appearance of the products is as excellent as before. 4. Compatibility( In accord with any brand recorder). 5. Adopting three molder type of recordable disc replication systems(Pioneer), the steady degree of production is high. 6. The dyestuffs use Ultra-green, stable and high, keep guarantee in data. 7. The silver layer (thickness ) controls the error rate and is smaller than 3%, quality consistency is high. 8. The CD of 48 X can be burnt and recorded finishing 2 minutes and 37 seconds ago. 9. The CD of 52 X can be burnt and recorded finishing 2 minutes and 26 seconds ago. 10. Technical support is led by the first major factory in world---CMC Limited Company, accredit 10 technological elites for quality checking as long time.