Survey: Chinese people increasingly night owls

China's night owls are staying up even later at night. A survey has shown that as of February, the average bedtime for Chinese people is 00:18 am, 17 minutes later than last year.

About 80 percent of college students go to bed after midnight, one in four falls asleep after 2 am, and about one in three wakes up after 9 am, according to the survey released by the Chinese Sleep Research Society ahead of World Sleep Day, which fell on Friday.

Based on data collected from the wearable devices of over 150,000 people, the survey also found that mobile phones have become an important factor affecting college students' sleep, showing that the longer they use smartphones, the later they go to bed.