Came across this and thought it looks insane
Add this to Guangzhou's short term metro plan
https://commons.wikimedia.org/wiki/File:Guangzhou-Foshan\_Metro\_Diagram\_(Future)\_by\_Tim.svg#/media/File:Guangzhou-Foshan\_Metro\_Diagram\_(Future)\_by\_Tim.svg
Heard that the govt is planning Guangzhou-Shenzhen cross city metro line (can add that too if you want haha)