In Seoul, South Korea, a forest sleep contest is held at Seoul Forest Park on last Sunday. The one who into the longest sleep mode will become the champion. /VCG Photo

More than 8,500 citizens attended the event in its third year. Before the competition, people will get sleeping bags, eye covers, pillows and sleep mode test equipment. After the competition, they can choose a good place to lie down and sleep. /VCG Photo

The contest originates from a group of Korean student, who held a sleeping contest to encourage their exam-weary peers to rest in 2015. /VCG Photo