Dr. Tian from Yanshan University and Dr. Ma from Jilin University cooperated with Dr. Wang of a University of Chicago. They compact a twice harder material than natural diamond at high temperature. The new material is called Nano diamond tile twin crystal. 

If necessary, we will use this new material to solve problem of drilling in hard formation.

Nano diamond tile twin crystal（compact pressure20GPa，compact temperature2000 °C）。