Ningbo, Wenzhou, Taizhou and Zhoushan are important commercial ports. The Hangzhou Bay Bridge between Haiyan County and Cixi, is the longest bridge over a continuous body of sea water in the world.
Is there an answer to this question (If it cannot be answered, say "unanswerable"): What is an important commercial port along with Ningbo, Wenzhou and Taizhou?
Zhoushan