Preinstalled serial bootloader in STM32F103

[Dayi]

Hello everybody,

I'm not familiarized with hardware's industrial production. My question is about the serial (UART) built-in bootloader that comes with the Blue Pill development board. If I would like to create a new custom circuit, and print 10 test PCB of this circuit with the STM32F103C8T6 MCU (not the Blue Pill, just only using the MCU), it would already brings the serial bootloader installed?

Thanks in advance

[Tesla DeLorean]

The ROM based System Loader that comes in all parts is described in AN2606

Anything else the blue-pill has programmed in FLASH will not come with the devices and will need to be programmed by you.

https://www.st.com/content/ccc/resource/technical/document/application_note/b9/9b/16/3a/12/1e/40/0c/CD00167594.pdf/files/CD00167594.pdf/jcr:content/translations/en.CD00167594.pdf