Anti-takeover is a normal form of company merger and acquisition, which has a long history in the United States and is a shortcut to the company's stock listing. At present, more and more companies adopt anti-takeover, and the number of companies listed by shell and IPO is basically the same every year (350 companies).
A typical shell listing includes two trading steps. First, shell trading, in which shareholders of non-listed companies absolutely or relatively control a listed joint-stock company by purchasing shares of listed companies; The second is asset transfer transactions, in which listed companies acquire non-listed companies and control their assets and operations.