Cambridge is located about 80 km north of London and is famous for the University of Cambridge. It has 31 colleges, exquisite buildings, solemn churches and red brick houses with green vines everywhere, including King's College, the center of Cambridge. Jianhe is a city-circle river, twisting and twisting, the river is built with many ingenious design bridges, of which Mathematical Bridge, Grey Bridge and Sigh Bridge are most famous. Although full of a strong academic atmosphere, Cambridge is still a bustling commercial and lively modern city.