What time does the hotel development start from the first day to noon the next day 12? "

The hotel industry is generally bounded by 5 am. You must check out on the same day 12 before 5 o'clock. You can check in after 5 o'clock and check out at 0/2 o'clock the next day.

So the most cost-effective check-in time is after 5 o'clock, but each hotel has its own regulations. I just said the general situation, so you'd better call the hotel before you check in. But if it is not necessary, you can check in at 9 am.