Several years ago China-based GigaDevice launched their GD32 microcontroller that took advantage of the ARB architecture and was compatible with STMicro’s STM32F103 microcontroller. The company is back with another GD32V series, only this time around they have dumped Arm in favor of RISC-V.
article: https://blog.hackster.io/gigadevice-unveils-new-risc-v-based-gd32v-microcontroller-c0a2b147568b