Does everyone send text messages about the bidding upgrade?

No. The bidding upgrade SMS is sent by the airline to eligible passengers. Through the analysis of internal customer data, airlines will select passengers who meet certain conditions (such as original reservation status and membership level) to send SMS invitations and bid for upgrade. Not all passengers will receive such SMS invitations, because airlines will screen target passengers according to various factors to maximize the success rate and benefits of bidding for upgrade. This can also better meet the needs of different passengers and improve the satisfaction of customers and airlines.