Over two months, Bearsh focused on reliability improvements in embedded systems and device drivers using C. In the telink-semi/zephyr repository, Bearsh addressed a critical deadlock in the USB CDC ACM notification path by introducing a semaphore reset mechanism, ensuring that notification transfers do not hang permanently after failures or cancellations. Later, in AmbiqMicro/ambiqzephyr, Bearsh improved the STM32 flash driver by conditionally assigning the jedec_id property only when appropriate build configurations and device properties are present, reducing runtime errors. This work demonstrated careful attention to error handling and configuration safety in low-level driver development for embedded platforms.