River in China, which rises in Yunnan province and flows into the South China Sea; length 1,900 km/1,200 mi. Guangzhou lies on the northern arm of its delta and the island of Hong Kong at its mouth. It is the longest river in south China.
The top left trigram symbolizes summer, south, and heaven. The top right trigram represents autumn, west, and the moon. The bottom right trigram stands for winter, north, and the Earth. The bottom left trigram represents spring, east, and the sun. Effective date: 21 February 1984.