I received a text message saying that the plane would not fly.

Dear HNA passengers, hello! Due to the failure of landing gear system, your flight HU7829 on February 8th was cancelled. Please contact customer service at 05375559003 to change or refund: (Note: This change is free, and the change or refund will compensate each passenger for flight delay according to 300 yuan.

There are too many such tricks, so be careful, that is, don't be greedy and cheap, and no flight will give you a refund because of delay or cancellation!