Core Viewpoint - Sichuan Jiuzhou (000801) clarified that its main business focuses on smart terminals, air traffic control, and microwave radio frequency, and it does not currently engage in PCB business [1] Group 1 - The company specializes in smart terminals [1] - The company is involved in air traffic control [1] - The company operates in the microwave radio frequency sector [1] Group 2 - The company does not have any involvement in PCB business [1]