Jiangsu is a Chinese province name, used as a noun in English, often referring to the Jiangsu Province in eastern China. The term combines the Jiang (江) river character and the su (苏) character, historically linked to the ancient state of Su and the Yangtze River region. In English, it’s pronounced as two syllables, roughly “jyahng-soo,” with tones not carried over from Chinese.
Full pronunciation guide