@Jianzhong Immediately take photo's of the damage that are time and date stamped. Get an estimate for the repair from a licensed professional. Document everything in the AirBnB messaging system. You must file the claim before your next guests check in or 14 days after check out which ever comes first. You send a request for the funds to the guest for the repair costs. If he declines to pay or does not respond in 72 hours then it's time to involve AirBnB.
AirBnB Australia +61 2 8520 3333