Established in November 1997, Wisheng Engineering and Technical Services Co., Ltd. is a subsidiary of Wilson Holdings Limited, specializing in petrochemical, oil refining and coal chemical plant construction and technical services, the company mainly provides EPC services to the above three industries (i.e. design, procurement and construction management service provider). The vast majority of the company's revenue comes from Chinese mainland, so the demand for the company's services comes from activities and capital expenditure levels and policies in the China Petroleum & Chemical, oil refining and coal chemical industries. In the petrochemical industry, China is still not self-sufficient in ethylene supply and needs to import a large amount of ethylene and its derivatives to meet domestic petrochemical demand; in the oil refining industry, China is a major net importer of crude oil. the basic policy for refining products is to strive for a balance between supply and demand. China's refining capacity is expected to increase from 542 million tons / year in 2011 to 760 million tons / year in 2016. In the coal chemical industry, based on China's abundant coal resources, innovation and improvement of coal chemical technology, and high prices of crude oil and liquefied natural gas, the Chinese government is expected to rely on China's large amount of coal resources to produce chemicals. Thus it can be seen that the company's three main businesses still have strong room for development in China.

However, it should be pointed out that due to the nature of the business, the number of contract projects executed by the company at a particular time is quite limited, and the factors that affect the company's performance of the contract will cause the company's total income, expenditure, profitability and cash flow to fluctuate greatly. it makes it difficult for investors to compare the company's performance in different periods. In addition, the company's contract customer accounts receivable increased significantly in 2011 and 2012, from 468 million in 2010 to 2.096 billion in 2011, accounting for 127% of 2011 revenue. Operating losses in the first six months of 2012. All these factors increase the uncertainty of the company, so we think the company is risky and do not recommend subscription.