Legal analysis: if the flight is delayed for more than 2 hours, Air China will provide free meals for passengers during meal time; If the flight is delayed for more than 4 hours, Air China will arrange passengers to rest at the hotel free of charge and provide shuttle service from the terminal to the hotel. Passengers who are delayed for 4 hours can get compensation including mileage redemption vouchers and Air China vouchers (for purchasing Air China tickets). China Southern Airlines (tentative): compensation for flight delay of 4 hours to 8 hours 100 yuan, and compensation for flight delay of 8 hours to 20 hours for 200 yuan. China Eastern Airlines: Launching electronic flight delay insurance. If the flight is delayed for more than 4 hours due to the airline's own reasons, passengers can get insurance compensation of 600 1000 yuan. Shenzhen Airlines: If the flight is delayed for 4 to 8 hours due to engineering maintenance, flight plan, transportation service and aircrew, the compensation shall not exceed 30% of the ticket face value; If the delay exceeds 8 hours (inclusive), the compensation amount shall not exceed 100% of the ticket face value held by the customer. Kunhang: No matter whether the plane is delayed due to fault or bad weather, whether the passenger has purchased insurance or not, as long as the ticket of Kunhang is purchased, according to the regulations, the passenger will receive 30% compensation for the delay of 4 to 8 hours and arrange accommodation; If the delay exceeds 8 hours, Kunming Airlines will compensate the passenger 100% of the ticket price and arrange accommodation.

Legal basis: Article 126 of the Civil Aviation Law of People's Republic of China (PRC) stipulates that if passengers, luggage or goods are delayed in air transportation, the carrier shall bear the responsibility; However, if the carrier proves that it or its employees or agents have taken all necessary measures to avoid losses, or it is impossible to take these measures, the carrier shall not be liable for compensation.