The red line of the red soil continent.
Geographical terms are together. It is an annular continent that crosses the big line cross, and the inverted mountain at the intersection of the big line cross is part of it. Because the mountain is high, it is also the only place for all pirates. Together with the big line, it divides the sea area into four parts: East China Sea, South China Sea, West Sea and North Sea. Pirates from all sides of the world must cross the red soil continent for the first time if they want to enter the grand line, and they need to control the ocean current of the upside-down mountain. When people see the red soil continent for the second time, it means that the new people who have traveled around the world for half a week are about to enter the new world. The second time I want to cross the red soil continent, I have two choices. One is to seek the consent of the world government, which is the safest choice. The other is to dive into the bottom of the sea for 10,000 meters and reach Fisherman's Island, because Fisherman's Island has a gap in the red soil continent, which can lead directly to the New World. This choice has certain risks. Most pirates will still choose to pass through Mermaid Island. Ralph Drew, the end of the big line, can also see the red soil continent, and the person who saw the red soil continent for the third time is the One Piece!