At the beginning of 2001, Qingdao Jingda Plastic Machinery Factory, the leader of the local industry that had been developing for nearly 15 years, disintegrated due to poor management. Several young people who used to work in it set up Qingdao Changjie with their skills and enthusiasm of young people. Plastic Machinery Factory. In 2004, the company officially changed its name to Qingdao Longchangjie Machinery Co., Ltd.; the company's specifications have grown from less than ten people to nearly thirty or forty people. At the end of 2008, with the expansion of domestic and foreign business, the original company's workshop and workshop area were too small to meet the requirements of order production and the business needs of the international market, so the company's area was expanded four times; moved to the current Qingdao Changjie In the factory of the machinery company, the number of personnel increased from dozens to hundreds. The output value has increased from more than 10 million yuan to more than 50 million yuan.