After AI express, investors ask questions on the investor interaction platform: the company only mentioned "the cumulative shipment of semiconductor polishing chips and epitaxial chips of the company in 2021 is 380msi" in the 21st Annual Report. The company's sales volume of semiconductor silicon wafer in 21 years is 751.54 MSI The difference between the two is 370msi. What type of semiconductor silicon wafer is this 370msi? Is it a companion film such as blank film and control film? What is the shipping structure of 370msi?
Tianjin Zhonghuan Semiconductor Co.Ltd(002129) ( Tianjin Zhonghuan Semiconductor Co.Ltd(002129) . SZ) said on the investor interaction platform on May 23 that the company's semiconductor business shipments in 2021 include grinding wafer, chemical corrosion wafer and a small amount of monocrystalline silicon rod in addition to polishing wafer and epitaxial wafer.
