Kinshasa, the largest city and capital of the Democratic Republic of the Congo (DRC), locates around 320miles(515km) from the Atlantic Oceans on the south bank of the Congo River. The capital of the Republic of Congo, Brazzaville, lies across the river. The landscape and culture are similar, so they are called The African Twin Capitals. The population of Kinshasa is about 14 million, currently ranks the 2nd largest in Africa. In 2050, the population projection of Kinshasa-Brazzaville will reach over 38 million and become one of the largest metropolitan areas in the world. Looking at the geography, the Congo River plays a particularly important role in gaining resources and transporting goods. It is the 2nd longest river in the world by discharge volume. Traveling and transporting on the river has long been commonly seen in Congo traditions.