Preview:
The hardware supports STM32F103CxTx and all pin-to-pin chips supplied by other manufacturers. Also compatible with STM32FEBKCxTx.
The default boot mode is main flash memory (BOOT0=0 and BOOT1=0), if you want to boot from system memory (BOOT0=1 and BOOT1=0) for serial burn, just press BOOTSEL button and hold, then press RESET button and release BOOTSEL button.
To be continued...