How to learn Sichuan dialect

If you have more Sichuan dialect, you can't turn your Mandarin into Pu Chuan. Oh, Sichuan dialect doesn't wrap its tongue, and it's basically flat. For example, for example, Mandarin is happy. Sichuan dialect is fast (pronounce four tones). If Beichuan is cut into Shirakawa, this is a dialect. You can understand when you understand it. I know there is a book that is a comparison table between Sichuan dialect and Mandarin. Some universities are using this book as a teaching material to correct Sichuan students to speak Mandarin.