"Helplessness" refers to "Naihe Bridge", and going to "Naihe Bridge" generally means forgetting past lives; The forgotten Sichuan is a legendary river in China. It is said that drinking the water that forgets Sichuan will make you forget everything, including yourself.

The sentence "Only you can't help forgetting Sichuan" means: "Even if you drink the river of" forgetting Sichuan ",you will never forget it even if you live or die."