Check my edit below.... this is legit.
While this certainly looks like a dodgy photoshop viral thing, I'm not entirely convinced it is yet. There are no obvious signs of photoshop editing in that picture but the most curious things are: the supposed lack of damage to the car, the seeming lack of any effect the car is having on the trees that are supposedly supporting it and the fact that the wheels, when not supporting the car, usually drop down lower than normal.
The things that are making me question whether this is something that happened or not are the fact that various sites claim to know where, when and to whom this happened. Viral bullshit doesn't normally have any of those things.
According to various Chinese news sites (like this one, for example http://news.qq.com/a/20140701/065068.htm or many more easily findable by google hk) this happened on June 30 in Wenzhou Jingshan Park North Gate intersection near Wenzhou City Zoo in the Zhejiang Province. They say the driver's last name is 'Pan' and he'd parked the car on a hill and neglected to put on the handbrake. The area is certainly mountainous enough for something like this to happen (here's a panorama near the area). I still find it hard to believe because: why is there only one photo of this? Strange for something viral and supposedly fake to have so many details attached to the story.
Edit: HA! there is a full story, second picture and an infographic here:
PS: My skills as a researcher are available for rent