Complex sentence: He then joined the Economic Development Board (EDB), and was based in Washington DC and Chicago from 1993 to 1997, thereafter in Suzhou, China, from 1997 to 1998.
Split into simpler sentences: He then joined the Economic Development Board (EDB). He was based in Washington DC and Chicago from 1993 to 1997, and in Suzhou, China, from 1997 to 1998.