Why did the US Mission send me a hotel discount red envelope for no reason?

Platform users are divided into two parts.

Part I: New users

If you haven't booked a hotel in Meituan before, he gave you a discount red envelope just to let you choose Meituan as a platform when you need to book a hotel.

Part II: Old users

If you have booked a hotel in Meituan before, then he will give you a discount red envelope, which is to activate old users.

Overall: For the platform, the purpose of his red envelope is to let you place an order on his platform.