Signese

1) toilet / mountain.

2) excrements / manual labor.

3) individual ??

4) understanding / cooperation / ??

My addition to edelweis' #4:

Money. 投资

@jbradfor: I still don't quite understand it...

does it mean a single person funds the toilet and manual labor?

or several persons?

or is it asking people to donate?

"Although it is not made explicit, this probably means asking you to ..."

put up with the smell!

Quick quesiton -

免冲 means doesn't flush, is that right?

Here is the text.

山上无水

免冲厕所

粪便人工

往山下运

个人投资

请您理解

谢谢合作

@Gleaves

Yes, I'm pretty sure 免冲 means there's no flusher. Their toilets are essentially just holes to deposit $@!# into.

1)This photo was taken outside a restroom on a mountain.

2) Operation of this facility requires excrement to be moved by laborers.

3) Said facility was funded by individual investments.

4) Your understanding and cooperation are hoped for. Although it is not made explicit, this probably means asking you to donate some money.

Feihong above (among others) has the answers if anyone is looking for them. The only additions I would make are

3) 个人投资 is basically saying - we set this up ourselves. We aren't a big company or the government.

3) They are asking for money but not really donations. Out of frame there'll a sign saying what the toilet costs to use. I can't remember what it was, but it was pricier than you'd expect for a public toilet, and I'd guess they'd got some abuse for it, so put this up to explain.

The sign was actually at Badaling Great Wall, but it was taken in 2006, so it's quite possibly not there any more, should you be planning a pilgrimage.

免冲 I would normally expect to be a chemical-type toilet which doesn't need flushing. I'm not sure if that's what this is, or it's just a pit - which isn't so much 'doesn't need flushing' as 'doesn't flush'.