In this short scene, we learn that we're introduced to a new character, a young man named "Fengyuziran" . He's a bit of a mystery to us, but he's the kind of guy who wants to know what's going on with his sister, "Shang zhen" , and her new boyfriend, "Qing zhen." We're not sure what to make of this one, but we do know that the two of them have a crush on one another. We also learn that "shang shangzhen" has a new invention: a new kind of "Mac39" vaccine that's supposed to cure all kinds of sexually transmitted diseases. We learn that this newfangled thing is going to be on the market in a few days, and that it's being promoted by a guy named "fengxingyan," who's also a big fan of the newfangled stuff.