Jiamusi (jyä´mōō´sŏŏ´) or Kiamusze (kyä´mōō´sŏŏ´, jyä´–), city (1994 est. pop. 548,600), E Heilongjiang prov., China. It is the chief port on the lower reaches of the Songhua River. The significant heavy and light industries of Jiamusi are centered mainly on large state-owned factories that are increasingly economically troubled, leading to widespread unemployment. There are rail connections to Harbin, to North Korea, and to Russia. The city was formerly the capital of Hejiang prov. The name sometimes appears as Chia-mu-ssu.