Hu Zhixin: More than three years. We have invested millions of dollars in research equipment and project research and development funds, introduced new materials and technologies from Australia and exchanged experimental results through numerous experiments and scientific argumentation by the expert team, and repeatedly collected the requirements and standards for the use of dust-free liquid chalk by school teachers and users. Finally, in September 2008, we independently innovated and successfully developed a mature environmentally friendly water-based pen product. And in June, 2008, 165438+ 10, Guangzhou Dunumen Education Technology Co., Ltd. was successfully registered and established as a professional emerging company integrating R&D, production, manufacturing, marketing and service of new environmental protection education products.
Explain it in detail.