It’s the same as BluePill - STM32F103C8T6 but with lower Flash capacity and RAM.

Source: https://embeddeddesignblog.blogspot.com/2022/08/stm32f103c6t6-vs-stm32f103c8t6.html

Note: The price range listed in image above might not be correct, depend on the time you see this and the country where you live.