1. Service component above the passenger seat Including reading light, reading light button, call button and call display light, hand adjustable vent, oxygen mask storage tank and manual open button, signal light, speaker, etc. 2. Overhead compartment above the passenger seat It is mainly used to store passengers' hand luggage, coats and portable oxygen bottles, fire extinguishers, microphones and other emergency equipment used by the crew. III. Flight Attendant Control Board 1. Front Flight Attendant Control Panel Including ground service switch, window light switch, overhead lighting switch, intercom telephone, passenger radio microphone and other equipment 2. Rear Flight Attendant Control Panel Including door light switch, work light switch, crew call system switch, pilot call switch, attendant call switch, reset switch and emergency exit light switch IV. Kitchen Equipment Kitchen equipment mainly includes: high-speed heating electric stove, hot beverage containers, electric cup socket, food storage cabinets, storage cabinets, drawers and waste bins. Water for the kitchen is supplied by the aircraft's pressurization system. But in an emergency, the system shuts down.