Why Guo Degang and Yu Qian say comedy when Yu Qian occupies a table to the outside of the program?

This is a form of traditional comedy, which is divided into: a head of sinking, son and mother of the comic, Liu live, legs live, etc. Yu Qian is a cupped-liang actor, the jargon is called "volume of work". Yu Qian is a comic actor, and in the jargon, he is called a "measure of life". So he has to be inside the table. Guo Degang is a comic actor, outside the table. Including the things placed on the table: two fans, two pieces of cloth, a piece of wood, jade (used to sing the lyrics of the peace), fast board (sometimes put sometimes not). The comic "double singing tongue twister", "counting the treasures", "learning to speak fast board book" and so on. All can be used to fast board