Core Viewpoint - Wu Tong Holdings (300292.SZ) and its subsidiaries do not engage in PCB (Printed Circuit Board) business, focusing instead on EMS (Electronic Manufacturing Services) with SMT (Surface Mount Technology) as the core [1] Company Operations - The company’s subsidiary, Intelligent Electronics, specializes in EMS, which involves sourcing PCB, chips, semiconductors, and other materials and components from upstream suppliers [1] - After procurement, the company completes processes such as surface mounting, inspection, assembly, and testing before delivering products to downstream customers [1] Industry Presence - Wu Tong Holdings has established a certain level of industry recognition in sectors such as new energy vehicles and industrial control [1]