Tianjin Port locates at the cross point of Beijing-Tianjin city band and 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 and Central and West Asia. Tianjin Port is the highest grade artificial port in the world. At present, the water depth of the main navigation channel is -21.0m, which is available for ship of 300,000 tons to enter and leave port with high tide.