[2] Li later served as the dean of College of Resources and Environmental Engineering, Chongqing University, from 1994 to 1998.
[citation needed] Li began to develop Water Jet TBM Tunneling Machine when trained at UC Berkeley.
There, he spent two years to make the machine capable of crushing stones which are extremely hard.
Consequently, they could infer the relation between characteristics of wear particles and effect of cavitation in pulsed abrasive water jet.
Based on this, they proposed a design standard of pulsed abrasive water jet nozzles.