Kunming is rated very high for amount of surveillance cameras here
www.visualcapitalist.com/[...]
Can we find a Chinese article that confirms this? Otherwise I won't trust this totally.

I've also seen a different surveillance ranking for global cities, and Kunming is also up there among top Chinese cities with most cameras. Understandable given the infamous train station attack which reached global headlines (thus kicking off the xj purge). Even DJ Armin van Buuren offered his condolences in one of his weekly episode sets when the attack happened. Moreover, our Provincial capital borders SE Asia, so yeah.