Be green. According to the relevant public information, the expression package of Sang journey to the south Terrier means that Bao Sang's girlfriend cheated on a male fan of Deep Sea Fish and turned Bao Sang green. The meaning of expression pack refers to the expression with pictures, and it is also a way to express feelings by using pictures. Expression packs are popular on the Internet, and everyone will send expression packs. In the era of mobile Internet, people use popular stars, quotations, cartoons and screen shots as materials, with a series of matching words to express specific feelings.