Mike Li manages B2B sales at Sunshine Electronics, a dual-factory OEM manufacturer of power adapters, USB-C cables, Ethernet and coaxial assemblies, and HDMI cables, with operations in Changzhou, China (founded 2003) and Vinh Phuc, Vietnam (added 2018). His daily work with North American procurement teams gives him a front-row view of how tariff policy, certifications, and supply chain risk are reshaping electronics sourcing decisions. He recently architected an open tariff calculator (sunshineadapter.com/tariff-calculator) used by procurement buyers to model the landed-cost impact of the Section 122 sunset and the U.S.-Vietnam reciprocal tariff framework across HTS codes 8504.40 and 8544.42. He can speak from operator perspective on China+1 sourcing strategy, electronics OEM/ODM oper...