Sun moved to Beijing to study in 2009, and continued to work in the city after he graduated. He now lives at a single room apartment with a monthly rent of nearly 2,000 yuan ($290).
"I feel it depends whether it's good or not to live alone," he said.
"I sometimes feel lonely since it's hard to find someone to talk with when I am down, and I am used to seeing doctors when I am sick."
"Even when I feel even lonely, when I left, when I return the room is still."
The young man said people earning livings in big cities, like Beijing, will undoubtedly experience a period of living alone, otherwise known as the "empty-nest" period, but will gradually find people to accompany them.
Tang, who was born in Southwest China's Sichuan province, chose to work in Beijing after returning from studying in South Korea.
"It's ok to live alone, though I will feel a bit lonely sometimes," she said.
The young woman said the empty-nest youth mainly reflects a psychological loneliness; however, added she had a "strong adaptive capacity to live alone in strange environment."
"I like sports and spending my leisure time listening to music, and watching films," Tang said.
"However, I feel it's tiring to make new friends, so I prefer to stay at home rather than socialize on the weekends."