I answered the question In what direction did the Qin dynasty expand the most? I said to the South then I was asked how do I think the East China Sea affected the Qin dynasty's expansion? My answer is- The Sea would allow the ability to trade with more people and it would give them more work for the fishing and boating industries. What do you think?

3 answers

They sound like good answers.
What event happened after the Qin Dynasty collapsed?
A civil war broke out.