Young volunteers from China help Cambodian schools build facilities in Siem Reap, through WoW Education, a Beijing-based organization. [Photo provided to China Daily]

Last year, when Ciweishixi, a Shenzhen-based company for internship hunters, launched its new South Asia "voluntourism" programs, it attracted more than 250,000 applications, according to its founder, Li Yaping. Around 3,000 young people were admitted and took the trips.

"Young people today want a richer experience," Li says. "Instead of taking regular approaches such as interning at big companies, an increasing number of them desire to take unusual approaches to connect with the world."

The effects of the ever-present internet also contributes to this trend.

"The internet connects people by their fingertips, but degrades the interpersonal relationship in daily life," Li explains. "Voluntourism allows participants to engage with local communities and do things together."

Studies have shown that engaging in community service provides mental rewards. Volunteer work fulfills people's desire to give back, helps them reduce stress and fosters empathy.