Met a guy in Beijing who was doing one of these although I am not sure if it was through the organization you linked or a different one. He was assigned to a charity rather than an actual business. He said he didnt do much at work and had a ton of free time. At first he used it to study Chinese but then started partying more and studying Chinese less... My impression was it was one of things where it is up to you to make the most out of it, otherwise you end up doing nothing or busy work.
Sorry I can't be much more helpful as I didn't talk to the dude very long.
Sorry I can't be much more helpful as I didn't talk to the dude very long.