What episode is ipartment Feng?

Season 5 episode 12. Feng is an actor in the ipartment series. In ipartment, episode 12 of the fifth season, Feng appeared in the bar, chatted with others and introduced a "super soap" product. Ipartment tells that Feng (played by) helps (played by Sean) to retrieve his memory in various ways, including role-playing and scene reappearance, which leads to a series of funny things. In this program, Feng's outstanding performance made the audience laugh and became a classic segment of this season.