What I decided to do was google these words:"chinese went to india vacation sh.t pictures"
Guess what? I think this was the post you remember.
It certainly was not me who first posted it. Haha!
That link is really old, so those pictures will not appear, some of them will not. Have right click and open picture in another window.
https://www.chinasmack.com/filthy-india-photos-chinese-netizen-reactions