DIYN RoHS management：
               1. Performance: hp Epson, Primax Electronics Ltd., Herlin, Ampire Co. Ltd., JOHNSON, Vbest
                   Electronics Ltd., and United Radiant Technology Ltd., are greening environmental protection
                   certified vendors.
               2. Standardized operation: RoHS ideals are followed through during incoming mateiral/process/delivery
               3. Vendor management: all vendors conform to RoHS regulations
               4. document systematization: RoHS resume is established for incoming/outgoing goods