The picture above shows the PCB that was proofed before. It is inconsistent with the PCB board diagram I uploaded. What I put forward is just an idea. I know that all of you here are masters of drawing boards, so the things you make must be very good. Not only practical, but also beautiful. So use your imagination as much as possible to make a small pen holder that you like. (It is recommended to choose white when proofing. The calligraphy fonts proofed by Lichuang Factory are really powerful. I really like this feeling.)
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