The water-diversion mechanisms scattered through the mountains were built by Zhang Wanshi before he left, draw…
The water-diversion mechanisms scattered through the mountains were built by Zhang Wanshi before he left, drawing on earlier designs. They greatly improved life for the locals.
After he returned to Hidden Mountain, he showed up only once to repair the waterways. After that, he went back to Mohist City and shut himself away in seclusion.