About 600 tons. According to relevant data, inland river ships carrying sand to Hangzhou can carry 600 tons of sand. Hangzhou, referred to as "Hangzhou" for short, is the capital of Zhejiang Province, a sub-provincial city and the core city of Hangzhou metropolitan area. It is the capital of Zhejiang Province, the economic, cultural, scientific and educational center of the whole province, and one of the central cities in the Yangtze River Delta.