How did you get here? From somewhere in [CELIA]
"It seems that you've arrived. Or at least, the elevator has reached the highest point for now."
You come to a large pipe that leads into the darkness. It is difficult to see the sign on the wall in the picture, but remember, any links in an image will also be visible in the source code. If you click on the sign on the wall, you can see it more clearly.
There are five written symbols in a circle, one of the symbols being a question mark. Presumably you have to find out that missing one, but how? Have a look at the name of the image. Two of the names have been given to you, so that narrows it down considerably. If you are lucky enough to speak this language already, you can probably guess which one is missing.
SPOILER:
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“These are the wuxing (or five phases). Have a look at the wikipedia page to see which is missing.”
Remember to refer to the posts in Getting Started if you need some general tips.