6 dated entries naming Suzhou, Jiangsu, drawn from 6 separate years between 424 CE and 1981 CE. Nothing here is written by us: each line is the sentence a Wikipedia year article used, and the link beside it opens the exact revision.
424August 4 – (Jing'ping era, 2nd year, 6th month ( liùyuè), the guichou day) Former Emperor Shao of China, exiled to Suzhou is murdered by an assassin.source
6th century
581The "Great City of Helu", situated on the shores of Taihu Lake, is renamed Suzhou during the Sui dynasty (approximate date).source
10th century
961The Tiger Hill Pagoda (or Huqui Tower) is built in the city of Suzhou, located in Jiangsu Province (Eastern China).source
14th century
1367October 1 – Red Turban Rebellions: Zhu Yuanzhang takes Suzhou from Zhang Shicheng, who unsuccessfully attempts suicide before being captured and taken to Nanjing, where he dies.source
15th century
1405July 11 – Ming Dynasty fleet commander Zheng He sets sail from Suzhou, to explore the world for the first time.source
20th century
1981The State Council of the People's Republic of China lists the cities of Beijing, Hangzhou, Suzhou and Guilin as those where the protection of historical and cultural heritage, as well as natural scenery, should be treated as a priority project.source