Full arm, butterfly crisp, Gao Qiao muffin, crab shell yellow. Political soldiers refer to soldiers with political conditions. There are five arms in China: PLA Army, PLA Navy, PLA Air Force in China, PLA Rocket Force and PLA Strategic Support Force in China. Each arm has political soldiers. Shanghai specialties include butterfly cakes, Gao Qiao muffins, crab shell yellow and other snacks. They are all Shanghai people's favorite snacks.