What are the 600-800 km tourist cities with Nanjing as the center?

I can recommend you to go to Shengsi Islands.

Reason:

One: cross the sea bridge and board the island by boat; Solve the desire to see the sea and take a cruise;

Two: swimming in the sea, enjoying the feeling of close contact with the waves and stimulating adventure;

Three: go fishing in the sea and experience the taste of fishermen pulling nets to collect fish;

Four: Taste the seafood of the island and enjoy the fishermen's life of the island compatriots.

Recommend joining a group

Attached is a map of Nanjing:

This map may not be very detailed. You can search on Baidu map: Shengsi Islands.