Core Insights - The fourth "Double Innovation" competition in the optoelectronic information industry was held in Changchun, focusing on promoting technological innovation and industrial integration [1][2] - A total of 332 projects registered for the competition, with 60 teams advancing to the preliminary round, showcasing the vitality and technological foresight of returning overseas students [2] Group 1: Key Projects - The "Smart Car Shed" project by Jilin Kunxi New Energy Co., Ltd. has established 100 car sheds in Changchun, collaborating with multiple state-owned enterprises and reaching a user base of 120,000. The project addresses winter charging efficiency and grid pressure issues, utilizing "green electricity direct connection" and "vehicle-to-grid" (V2G) technology, with a cost recovery period of approximately two years [1] - Zhejiang Skyworth Microelectronics Co., Ltd. presented a project focused on the research and development of third-generation compound semiconductor materials, specifically chemical mechanical polishing liquids for silicon carbide and gallium nitride. The project is currently in the customer testing and small-scale production phase, with potential local partnerships for capacity layout [1] - Jilin Rishui New Energy Co., Ltd. introduced a "Direct Current Power Internet" project, proposing an innovative approach to the underlying architecture of power systems. The project aims to construct an efficient and safe block-based direct current grid, significantly reducing line losses in photovoltaic power plants and enhancing grid capacity and resilience [2] Group 2: Event Significance - The competition serves as a platform for overseas returnees to showcase their innovative achievements and is a significant opportunity for Jilin Province to connect with high-end resources in the optoelectronic industry and promote the implementation of technological achievements [2]