I couldn't figure out Aliexpress Affiliate stuff so here's a basic link ^^;
CH341a v1.6 - https://www.aliexpress.com/item/4001120167630.html

NeoProgrammer - https://khandishnetwork.com/dl/neoprogrammer-software-2021-v2-2-0-8-22-06-2021/

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Chapters:
00:00 - Intro / Original CH341a
02:12 - What's in the packet
05:23 - v1.6 Volt Select Test
07:40 - Preparing a ROM chip
11:00 - Using NeoProgrammer
17:32 - Conclusion