According to the relevant regulations of the General Administration of Customs, the origin of “integrated circuits” is determined based on the four-digit tariff number, meaning that the wafer foundry is recognized as the origin. The China Semiconductor Industry Association suggests that for “integrated circuits,” whether packaged or unpackaged, the origin declared during import customs clearance should be based on the location of the “wafer foundry.” This is very clear: whether or not to impose tariffs, only the wafer foundry is recognized. SSMicroelectronics (sz300456) is a wafer foundry focused on MEMS (Micro-Electro-Mechanical Systems) wafer process development and manufacturing, with its core business covering the entire chain of services from process development to wafer foundry. The following is a detailed analysis from multiple perspectives: 1. Business Positioning and Model The core capability of wafer foundries SSMicroelectronics’ main business is the process development and wafer manufacturing of MEMS chips, adopting a “process development + foundry production” model. Process Development: Custom manufacturing processes based on customer-provided chip design solutions to solve product “manufacturability” issues. Wafer Manufacturing: After completing process development, providing batch wafer foundry services. Global Layout and Production Line Scale The company has 8-inch MEMS mass production lines in Beijing, Stockholm, Sweden, and is building a 6/8-inch MEMS pilot line in Huairou, Beijing, to serve the small batch and highly customized needs of startups, forming a collaborative system of “pilot line + mass production line.” 2. Technical Advantages and Industry Position Independent Technology and Patent Accumulation SSMicroelectronics has mastered internationally leading process technologies such as Through-Silicon Via (TSV) and Deep Reactive Ion Etching (DRIE). Its wholly-owned subsidiary, Silex in Sweden, has ranked first among global MEMS pure foundry manufacturers for several consecutive years, and ranked 26th among global MEMS manufacturers in 2022. The company has long maintained its position in the first tier of global MEMS wafer foundry and represents the mainstream technical level in the industry. 3. Role in the Industry Chain and Strategic Significance Domestic Substitution and “Choke Point” Breakthrough SSMicroelectronics promotes MEMS localization through independent technology, especially in areas such as photolithography lens and 5G filters, reducing dependence on overseas supply chains. Policy and Capital Support The company has undertaken several national R&D programs (such as the “8-inch Silicon-based Piezoelectric Thin Film and Piezoelectric MEMS Sensor Manufacturing Process Platform” project) and has received government subsidy support. The company has long maintained its position in the first tier of global MEMS wafer foundry and represents the mainstream technical level in the industry.