The grandfather of Big Head Son, Old Man, is an old Beijinger who is good at cooking traditional Beijing dishes. Big Head praised him highly. Big Head promoted his daily dinner in the kindergarten, saying how rich it was, which made the children salivate. The supermarket owner's son Chubby Dudu was invited to Big Head's house that night. He tasted the noodles made by his grandfather and almost swallowed his tongue. But Chubby Dudu's parents were worried. A large supermarket was newly built next to the community. It has a full range of items, low prices, and is very close to the community. It has squeezed Chubby Dudu's community supermarket so much that it is almost deserted. The couple was very upset.