Xu Chen, male, born in Qiaojia County, Zhaotong City, Yunnan Province, is the founder of Vivian Dawson Network, the chairman of Yunnan Vivian Dawson Technology Co., Ltd. and the general manager of Yun Qi Internet. He is young and promising. Engaged in program development, virus and anti-virus security research, advocating the use of front-end development and cloud computing to provide complete solutions for enterprises. Internet security filtering software-Little Green Umbrella green Internet designer, brilliant USB firewall designer (now named Anno USB Guardian). In 2008, he won many computer certifications at home and abroad, invited guests and consultants of many security websites, and two software patents. He has published albums such as "delphi Writing and Design" and "Learning C Language in Depth". There are more than 80 original software, more than 60 academic papers and 300 animation tutorials.