Hi I was the one who edited the City Park page yesterday. (but it was reverted.) City park currently provide +3 culture if Liang is in the city. The current page is wrong. 

Not much reliable source online but I found this. Also if you just load up your game and check Civilopedia you will see.

Sorry I didn't sign up for the sight made it look like sabotage.

Community content is available under CC-BY-SA unless otherwise noted.