China
China is one of the world's oldest civilizations: it has the oldest continuous civilization near the Yellow River region. There is archaeological evidence over 5,000 years old. China also has one of the world's oldest writing systems (and the oldest in use today). China has been the source of many major inventions. Geographically, China’s longest river is the Yangtze River which runs through mega cities and is home to many species. It is the world’s third longest river.