Work is done.
I'm not very satisfied with the result. Because it's been a long time since I played, I've forgotten some things. More importantly, some rules have been changed. By the time I realized these rules had been changed, there was no time to adjust. Therefore, some routes don't seem as efficient and elegant.
If I have time in the future, I will play again, and some rules will be adjusted back to the old ones, which will increase the efficiency of some stations by more than 50% and make the layout more concise and compact.