Having dived head long into CCTV for both work and fun (yes, it's true), the image quality to cost impact is unbeatable.
However, as previously pointed out by many other commenters, the security (for us, not China), doesn't exist.
All the software and apps have massive 'phone home and share the audio and video' holes, so much so that on some of the apps, you can see somewhere in China, likely Shenzhen, a nice bland factory, but you can move the camera view !
So when my 360 camera cost, and please sit down for this gem, £3.66 Inc VAT and Amazon delivery, was powered by usb and had IR and a white light option. I bought 2, just to take one apart.
It still works !
And going up to the £75 per camera bracket, was full colour night vision, using a superb fixed lens, was 5mp res, and had line crossing and if used with the right NVR, number plate recognition ! That was Hikvision.
We can't compete, on any level, so I have no idea, when pretty much all the boards and units are China made, that it makes any difference which name is on the outside.
Maybe the UK government would like to start our own CCTV and electronics factory, just so they can guarantee what goes on their sites, and not rely on sub-contracts.