Conversation so far:
What is the south-point chariot?
The south-pointing chariot was another mechanical device credited to Zhang Heng.
Are there any other interesting aspects about this article?
It was a non-magnetic compass vehicle in the form of a two-wheeled chariot.
When was it created?
125.

Question: Did any one aid him on its construction?
Self-contained rewrite: Did any one aid Zhang Heng on the south-pointing chariot construction?