Ticket restrictions: stay for at least 3 days, and the ticket is valid for 1 month. Tickets may not be signed and transferred; Shall not be changed; Refunds are not allowed. what's the meaning

This shows that the ticket you bought has a very low fare, which is a "special price" ticket and needs you to use it within one month. It is not allowed to:

1. No transfer: No transfer to other airlines;

2. No rescheduling: Only the flights and dates listed in this ticket are valid and the dates cannot be changed;

3. No refund: this ticket cannot be refunded, that is, the listed flight date must be used, such as personal reasons.

If it is not used on time, the ticket will be invalid.