Gree barbarian refers to the hostile takeover of other enterprises by private equity funds, which marginalizes the original shareholders and management of the company. "Barbarians" is not a new concept, mainly refers to those placards in the capital market, who directly start without communicating with the management of the acquisition target. It is synonymous with hostile takeover, which can be traced back to a commercial war documentary masterpiece called "Barbarian at the Gate" in the 1990s, reappearing the famous hostile takeover in the history of Wall Street, and taking the lead in proposing the word "Barbarian".