Group 1 - The company, Wutong Holdings, clarified on September 22 that it and its subsidiaries do not engage in PCB (Printed Circuit Board) business [1] - Wutong Intelligent Electronics, a subsidiary, focuses on EMS (Electronic Manufacturing Services) with SMT (Surface Mount Technology) as its core, sourcing materials like PCBs, chips, semiconductors, and passive components for assembly and testing [1] - The company has established a certain level of industry recognition in sectors such as new energy vehicles and industrial control [1]