Beijing YingGuangWanNian Technology Development Co. Ltd. (YGWN), established with a modern business model in April. 2000, is a high-tech joint-stock enterprise specializing in the research, development, production, application and dissemination of photoluminescent products.
Nowadays, environmental protection, energy-saving and security have become a close-attention-paid topic all over the world. In according with this tendency, YGWN has...
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