Founded in 2019 as part of Tsinghua-Berkeley Shenzhen Institute (TBSI), the RISC-V International Open Source Laboratory (RIOS Lab) began its journey of bringing the research effort of RISC-V CPU with its software and hardware ecosystems from UC Berkeley to the rest of the world. As a premier member of RISC-V Foundation, RIOS is aiming to demonstrate its commitment to the open source platform for chip developers with far more economical and efficient technology.