港口投资具有的资金投入大、回收周期长、资本成本高等特点,使之客观上存在一定的风险。目前,我国港口上市公司大多是由港务局或集团将部分港埠及相应的设施分拆后上市,这种体制使得上市公司与大股东之间存在着千丝万缕的联系,因而增加了风险的可能性。为了保证上市公司的质量, Investment in port has a large capital investment, long recovery cycle, high cost of capital characteristics, so there is a certain objective risk. At present, most of the listed port companies in our country are listed by the Port Authority or the Group after the ports and their corresponding facilities are separated and put on the market. This kind of system makes the connection between the listed company and the major shareholders inextricably linked, thus increasing the risk possibility. In order to ensure the quality of listed companies,