BEIJING ZHONGKE TECHNOLOGY DEVELOPMENT CO. LTD is also known as YaYa. YaYa environmentally friendly recycled product enjoys a high reputation in many countries in the world, and this has a close relation to its unique manufacture process and consistent environmental protection consciousness. In the environmentalproduction, YaYa has developed the recycled newspaper pencil, recycled paper ball pen, of molded pulp products and so on, many kinds of environmental office and study stationery. YaYa ...