Arduino development board based on APM32

The reason is that
    I discovered this chip made by Zhuhai Jiguang when I was shopping in Lichuang Mall. I searched for information on the Internet and found that this chip can be used to replace STM32F030R8T6 (good guy, I really only changed the name of the manufacturer.) And This is also my first time trying to program an STM chip. In addition, the recent increase in chip prices has been extremely outrageous, so I plan to use this chip to make my own minimal system.
At first,
  this board was a minimal system, so the schematic diagram was very simple, and the PCB was also scrawled with all the pins that the chip could lead out. Just take a look at it. If there is anything that can be improved, please comment below, thank you. The finished PCB is as follows: Then we start welding, and the final welding effect is as shown in the figure:
 
Programming
can be done by installing the STM32 library on Arduino according to the online tutorial, which is very simple.