I went to high school in Jiangsu and took the college entrance examination in Sichuan.

You can go back to the college entrance examination in Sichuan, and it is best to stay in the college entrance examination in Jiangsu. Jiangsu is an independent proposition. Although it will be difficult, you should be able to adapt to the college entrance examination in Jiangsu because you are in high school in Jiangsu. In addition, the versions of Sichuan and Jiangsu studies are different, so it will be difficult to get used to it when you get back to Sichuan. It's best to do it well in the first half of the college entrance examination, but it doesn't matter after the college entrance examination, but I heard that the investigation is quite strict. As for the difficulty of getting into universities there, it is even more difficult to get into other provinces. For example, it is more difficult for Jiangsu to enter Sichuan than Sichuan, but it depends on the quality of the university you want to enter.