I don't think that's how you spell working for rent...

30 hours of volunteering a month cuts the rent by 500 yuan (about 74 U.S. dollars). Forty hours earns a 750-yuan discount, while 50 hours covers the entire 1,000-yuan rent.

Tho it is still a choice for better life. But "volunteering" in exchange for something other than goodwill is just bartering your labor.