is there a route from incheon on pyoungteck to shanghai? I want to go to southern China if possible.

What do you mean by "on pyoungteck"? Anyway, you may wanna travle by cruise, don't you? Well, I just know cruise VICTORIA Costa Victoria is in the service from Shanghai to Incheon, so you'd better make sure whether it operates for the back journey.

What's more, the best way from Incheon to Shanghai should be the direct plane.