The Chukchi are used to sleep for only 4-5 hours. To survive in the peninsula one has to work nonstop.

楚科奇人习惯只睡四五个小时，为了生存他们必须不停地工作，对此他们已经习以为常了，所以几天几夜不睡觉也没问题。

youdao

Founded in 1973, Cloud Gate (it gets its name from China's oldest dance, dating back 5, 000 years) is on a nonstop voyage through world cultures, fusing tai chi, meditation, Chinese opera, modern dance and ballet into an art form that has captivated international audiences.

CNN: ASIANOW - Asiaweek