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?

They sound like good answers.

What event happened after the Qin Dynasty collapsed?

Your answer regarding the Qin dynasty's expansion to the south was correct. The Qin dynasty expanded primarily to the south, incorporating regions such as modern-day southern China, Vietnam, and parts of Myanmar.

Now, onto the question of how the East China Sea affected the Qin dynasty's expansion. Your answer is partially correct. The East China Sea indeed provided the Qin dynasty with access to international trade routes, allowing for potential economic growth through increased commerce.

However, it is important to note that during the Qin dynasty, the concept of marine trade and the development of fishing and boating industries were not as significant as they would become during later dynasties. The Qin dynasty focused more on land-based expansion and agricultural development.

To further improve your answer, you could consider the following points:

1. Geopolitical Influence: The East China Sea would have provided the Qin dynasty access to coastal regions and islands, allowing them to establish control and exert influence in the area.

2. Maritime Resources: The sea would have provided the Qin dynasty with access to marine resources such as fish, shells, and seaweed, supplementing their food supply and economic resources.

3. Defense and Invasion: The East China Sea acted as a natural barrier and provided protection against potential invasions from the east. It also offered a strategic advantage if the Qin dynasty wanted to expand further into northeast Asia.

4. Foreign Interaction: The presence of the East China Sea facilitated the Qin dynasty's contact and potential cultural exchange with neighboring civilizations such as Japan and Korea. This could have influenced their trade, traditions, and overall development.

Remember, when answering historical questions, it is crucial to consider the context of the time period and the specific characteristics of the civilization you are discussing.

A civil war broke out.