Marseille is France's second largest city and largest seaport with a population of 1.23 million. The city is surrounded by limestone hills on three sides, with beautiful scenery and pleasant climate. Southeast of Marseille is close to the Mediterranean, with wide water depth and port, no rapids and dangerous beaches, and unimpeded 10,000-ton wheels; The western region is connected to the Nordic region by the Rhone and the flat valley. The port consists of Marseille, La Vera, Fosse and Rona Saint-Louis, with an annual cargo volume of 100 million tons, making it the largest gateway for France's foreign trade.