Tacoma, a port city in Washington State, is the third largest city in the state, with a population of 213,000 and a large urban area of 485,000 square kilometers, is a sea, land and air transportation center, agricultural and forestry products distribution center and processing center, known as the “capital of the American lumber industry”, the Port of Tacoma and Seattle have formed an alliance, constituting the third largest port in the United States.