Changshu (Chinese: 常熟; pinyin: Chángshú; Wade–Giles: Ch'ang-shu; literally: "evergrow") is a county-level city under the jurisdiction of Suzhou, Jiangsu province, and is part of the Yangtze River Delta. It borders the prefecture-level city of Nantong to the northeast across the Yangtze River. Due to the mild climate and terrain there, it has enjoyed a high level of agriculture civilization since ancient times, and is named after this, for the first character of its name (常) means "always, often", while the second (熟) means "ripe".