Happy Benefit Seongsu is a Chinese restaurant in Seongsu that serves conveyor-belt hot pot. The red broth comes with a bear that melts and thickens the soup, and there is also tom yum broth, a sauce bar, and self-serve corners with tteokbokki and fried rice. You take as much as you want from the rail, and eating alone is comfortable. The rail ingredients dry out and the selection is small, so it is hard to pick up noodles and quail eggs again.