Can I get a refund if the tour group organized by Meituan doesn't go?

This money should be non-refundable, because you have already reported it to the travel agency, and the travel agency has arranged your seat and room. If it is not replaced, then the money can't be given to you and it is invalid. If you can find someone else to sit in your seat, then this person can refund your money. If it is not replaced, the money can't be refunded.