Please check in at the store from 12 to 6: 00 the next morning. What do you mean?

Please check in at the hotel from 12 to 6: 00 the next morning, which means that the hotel will check in from noon 12 to 6: 00 the next morning, after which there will be additional charges. Hotel 12 o'clock means noon on the day of check-in 12 o'clock, and 6 o'clock the next morning means 6 o'clock the next morning after check-in. The hotel will charge extra before check-in.