^ guess the give-away would have to be guy in the foreground holding the bottle of water in the left hand and a whistle slung round his neck... plus they're all smiles which is huge change from the usual frowns that used to be so common in most photos I've seen taken with/of mainland Chinese...

At first glance though, I had flashbacks of some of the scenes in “Every Which Way but Loose" with the bikie gang the Black Widows...