Core Viewpoint - The company Tongfu Microelectronics (002156.SZ) has made significant progress in the development of domestically produced CPO switches using 2.5D packaging technology, which have passed preliminary reliability tests [1] Group 1: Company Developments - Tongfu Microelectronics confirmed participation in the development of CPO switches and stated that the products have achieved breakthrough progress [1] - The company indicated that future developments will be assessed based on customer and market demand [1]