Is it reasonable to deduct the full amount if you don't stay in the hotel?

Unreasonable. According to the Consumer Protection Law, it is unreasonable to deduct the full cost for not staying in the hotel. According to the provisions of the Civil Law of People's Republic of China (PRC), business operators should clearly mark the price of goods or services. When using standard clauses in business activities, business operators should draw consumers' attention to the contents that have significant interests with consumers in a significant way. If the customer has booked the hotel and needs to cancel the order for personal reasons, if the deposit is paid, the penalty will be applied and the deposit may not be refunded.