Backdoor listing refers to the "back door" of the shortcut listed on the stock exchange. If a company press the "front door to go" (regular way) way to apply for listing on the stock exchange, it takes considerable human, material and time, such as hiring accountants audited accounts, to identify investment bank listed on the market conditions and underwriting of new shares issued and many more. In contrast, the "backdoor listing" would much simpler. These companies want to market to look for a "shell company" in the stock market. This type of mosquito belonging to the shell company generally shares, assets and turnover are small, internal structure is relatively simple. Backdoor listing the company through the acquisition of all or most of the shares and transformed into a public company, listed companies legally put on the cloak. Then, it reorganized shell companies, such as the reorganization of the Board, to replace officers, change management policy and so on. The company may also use its assets transferred to the shell company name, while increasing the share capital; also shedding may change the company's name. Thus, the company borrowed other shell companies, became a public company, with a new guise.