Tianjin Port, China. Tianjin Port is located at the cross point of the Beijing-Tianjin city band and the Bohai Rim economic circle. It is the sea gate of Beijing, the important international trade port in northern China, and the link to connect Northeast Asia with Central and West Asia. Tianjin Port is rated the highest grade artificial port in the world. Tianjin Port is also the largest comprehensive port in northern China, with a water-land area of 336 square kilometers (the land area portion is approximately 131 square kilometers). There are 159 various berths in total within the Tianjin Port, including 102 berths over 10,000 tons.