The Beijing institute of Open-Source Chip (BOSC), founded in 2021, develops strong ties with academia and industry. In addition to the successful development of industry’s open source and high-performance RISC-V CPU core XiangShan, a core mission of BOSC is to promote and contribute to the open-source chip ecosystem, covering not only design tools (such as agile development tools and open-source EDA tools), but also verification methodologies (such as open-source verification) and education (such as the One Student One Chip (OSOC) Initiative). This presentation will introduce 3-5 key contributions that BOSC has made or plans to make to the open-source chip ecosystem in terms of exploration, achievements and lessons learned. Details and slides: https://riscv-europe.org/summit/2024/conference#open-source-at-bosc-achievements-and-challenges-details