ZJTT Electronic Materials Technology Group is a leading manufacturer of piezoelectric crystal materials in China. It has successfully developed and mass-produced 6-inch lithium tantalate (LT) and lithium niobate (LN) crystals and blackened polished wafer products. Having achieved a foreign monopoly, filled a domestic gap, and achieved independent and controllable technology, the company's piezoelectric crystal materials are in a leading position in the domestic market and have established stable cooperative relations with major Chinese SAW manufacturers. The domestic substitution of piezoelectric crystal materials needs to develop in coordination with the domestic substitution process of downstream device manufacturers.