Why did Shanghai Hotel knock at eight o'clock? Do you need breakfast?

There is a breakfast reminder. Breakfast refers to a meal enjoyed from 6: 00 to 8: 00 in the morning, and all hotels in Shanghai include breakfast reminders. Every morning at eight o'clock, a customer service staff will knock at the door and ask if breakfast is needed. Shanghai is located in the middle of China's north-south arc coastline, with convenient transportation and vast hinterland. This is a good river port and seaport.