How does Civilization 5 choose its starting position?

1, add a civilization to the plot editor and set it up.

2. Then choose Civilization to join at the beginning of editing the story.

3. Enter the game and select mod.

4, and then select the single-player game in mod.

5, and then adjust the number of ai and a series of details (but it seems to be determined by the initial position of the random player in the map).

6. Then simply check the box for loading drawing mode.