There is no silk screen placed on the board. You need to solder by yourself according to the PCB and schematic diagram, which is a bit troublesome (the schematic diagram and PCB are in the attachment).
Qinheng official website configuration tool link: https://www.wch.cn/downloads/CH34xSerCfg_ZIP.html
Physical map:
Test (CC line, connected to computer):
Test (CC line, connected to mobile phone):
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