CH32X033F8P6 Programming via USB to Arduino ide Without WCH-Link

[Saandeeparduino]

Hi,

Thank you for sharing this CH32X033F8P6 development board design.

I have a question regarding the use of a factory-fresh CH32X033F8P6 MCU on a custom PCB. If I build the same USB circuit shown in this project, can I upload sketches directly from Arduino IDE through USB without using a WCH-Link programmer?
Does the CH32X033F8P6 come with a factory USB bootloader (DFU), or is it necessary to use a WCH-Link once to flash a bootloader before USB programming becomes possible?
My goal is to manufacture a board with the raw CH32X033F8P6 and allow firmware updates through USB only, similar to ESP32 boards.
Could you please clarify the recommended programming method for production boards?

Thank you

[wagiminator]

Yes, the chip has a factory USB bootloader.

[Saandeeparduino]

Thank you for your reply.

Yesterday, I completed the schematic design. If you don't mind, could you please review it and let me know if there are any mistakes or recommended changes?

I used the VDB circuit for USB-P and the 3.3V power supply section