After the new card is issued, the bank does not specify the specific activation time, as long as it is activated before the validity period of the card.
The validity period of the card is on the front of the card. There are four numbers at the lower right of the card number, including a slash in the form of "month/year". For example, write 0 1/2 1, indicating that the card will expire on 2 1 and 1. After the expiration date, the card will be invalid, and you will not be replaced if you don't open the bank.
If the landlord has other questions, you can ask.