Qingdao Guolin industry co.ltd was founded in 1994銆俀ingdao Forest Industry Co. Ltd. is engaged in the research and development of new products of ozone oxidation process. Qingdao University of Science & Technology, Beihang University, and the Shanxi Institute of coal chemistry, and other colleges and universities domestic experts and professors to develop new product project. Mature industry has reached a level of the glyoxylic acid crystal craft present ozone oxidation of maleic anhydride method, product quality of domestic and foreign manufacturers demand affirmation, to fill gaps in the domestic technology for preparation of high purity crystal glyoxylic acid product.