Sleep epidemic

OK, I know that there are many cultures where it is acceptable to sleep during the day. I often wonder why some of the English speaking cultures do not do this. I am also curious about the sleeping habits of Chinese. I just don't understand it.

It doesn't matter where one goes around here, there is always someone sleeping. In offices many folk have a lounge beside their desk for their sleep during the day. In shops it is common to see the shop keeper fast asleep in the store. Shopping at lunch time can be interesting!!!

If one travels on a bus, many of the passengers are asleep - even for short journeys. Certainly on long journeys they tend to sleep most of the trip! If a tour bus passes you will be able to see most of the Chinese passengers sound asleep.

In class, it is common for the students to be sleeping. They might sleep right through the class. It is somewhat annoying for us - but quite acceptable. Now the students in China do have long hours, but they do get sleep time during the day.

Sure, they are up at 6 am for morning exercises, and then have class from 7.30 am. But classes are finished for the morning at 11.35 am and they have a two hour break. Most will sleep. Many do have classes in the afternoon and the evenings, but still I am curious about their need for SO MUCH sleep.

Is their diet adequate? I wonder if they get enough protein. I wonder what they think when they go to the UK, US or Australia. No "siesta."