There was an unexpected incident that the door lock was out of battery and we could not open the room door at 1am++. We went out for gathering during CNY and came back at around midnight 1am. Due to the issue, we waited for more than 1 hour at lobby. The staff tried his best to open the door but failed to open it. I know it was not the fault of the staff. Then, we got offered to another temporary room but the thing to highlight was our luggage and pyjamas were left in the room that was locked out and we were really tired at the time. Need to improve on regular checking on the door battery to avoid this kind of issue again. Overall, it is clean and staff are friendly.