I think the Li River karst country would be a perfect place for the 7.5, and your image is the proof.
Back in the late 90s (ouch!), I took a break from a cycle tour to spend two luxurious days floating down the Mekong to Luang Prabang (Laos) on an old riverboat. I had a 17mm Tokina on a battered F3, and got a few memorable transparencies. I seem to remember that the trick was to not get my feet in the shot.
I wonder if my wife would OK a Samyang 7.5 for our upcoming vacation in Yunnan?