According to the rules of renunciation, we only need to leave the key in the room when we check out. I even asked how to return the key when we left two days before renunciation. They told me to leave the key in the room, but on the renunciation day, they asked me to return the key to a place one block away. I've already stated that we have a lot of luggage, but the reason they gave was that they didn't have a spare key and I had to do it. The lack of a spare key is not the tenant's problem. Besides, you as the landlord have failed to comply with the check-in rules or the reply given to me by the staff, so how can you ask us to comply with the rules?