摘要
Tianjin is located in the middle of Gold Coast of North China as well as the central area of Jing-Jin-Ji Metropolitan Circle.It is the major outlet to the sea in the northern,northeast- ern,and northwestern districts;the axis of two sectors which represent both interna- tional and domestic opening of North China;
Tianjin is located in the middle of Gold Coast of North China as well as the central area of Jing-Jin-Ji Metropolitan Circle.It is the major outlet to the sea in the northern,northeastern,and northwestern districts;the axis of two sectors which represent both international and domestic opening of North China;
