I have collected information about the amateur radio from various sources (Telegram Groups, You Tube, Github) and tried to bundle the information. I would like to thank everyone who works on this "project". I try to name sources as possible, but often I can't assign who was diligent. Comments and additions are welcome.
Links to many people working on the UV-K5
ludwich66 - Quansheng UV-K5 Wiki
Tunas1337 - UV-K5-Modded-Firmwares
sq5bpf - uvk5-reverse-engineering
fagci - qs-uvk5-firmware-modder
piotr022 - UV_K5_playground - first attempts to prepare build and debug environment
Hackaday article 🛠
Telegram Channel - EN
Telegram Channel - RU
Telegram Channel - ES
Telegram Channel - IT
Telegram Channel - PL
Telegram Channel - DE
Official UV-K5 support page: Chinese | English
Official UV-K5 product page: Chinese | English
Official UV-K5(8) aka UV-K6 support page: Chinese | English
Official UV-K5(8) aka UV-K6 product page: Chinese | English
FCC Reports / fcc.gov
Google Drive folder with useful info
Facebook - Quansheng Electronics Co., Ltd.
Facebook - Quansheng UV-K5 User's Group
Facebook - QuanSheng UV-K5 UV-K5(8) UV-K6 - Polska
Facebook - Quansheng UV-K5 UK Users
Facebook - Quansheng UV-K5 Philippines User Group