“…Since the state urged the construction of ecotypic ports, changing the spatial distance between ports and cities has become an important measure for many coastal cities to develop ecotypic ports for sustainable development. For example, the Huangpu River Port of Shanghai Port has been largely relocated to Waigaoqiao Port Area and Yangshan Deep-water Port Area; the up-scaling transportation in the north main port area of Tianjin Port has seriously disrupted the green and livable urban construction of Binhai New Area, which leads to the current planning of adjustment and relocation of the port area; Xiamen Dongdu Port Area has transformed some multi-purpose terminals to cruise berths and is planning to move the freight function to out of the island; Ningbo Beilun Port also intends to gradually transfer bulks transshipment operations to Chuanshan Port Area and Majishan Port Area, which are farther away from the city [1,3,6]. Some scholars have tried to evaluate the impact of port-city separation in recent years, but most of them ended up with qualitative descriptions, lacking quantitative research on the changes of factors such as resource consumption, environmental protection, and integrated transport costs that arise from port-city separation.…”