Ko te whakatuwheratanga o te Grand Canal o Haina i roto i te Sui whare ue'i te whanaketanga o Tianjin i roto i te mall. Tae noa ki 1404, i huaina Tianjin na'e ""Zhigu"" (直沽) e te tikanga tauranga tika. I roto i taua tau, whakaingoatia Emperor Yongle te pa kia rite ki Tianjin, uhingá ko e ""mōkihi te rangi 'ki te korero ki (te Tama a te rangi) whitinga o te awa i taua wāhi i te Hiha. I muri whakapumautia he pa i roto i Tianjin, e mohiotia ana ko ""Tianjin Wei"" (天津 卫), te 'Fort o Tianjin'.