qfa Hik copy cameras with plastic lenses that warp in the sun, second and third, and fourth rejected cmos chips. If you're not buying from a Hik registered dealer it will be a copy. Same with Dahua, they dont make cameras for anyone else. they dont sell their rejects either, they retail them as a DIY product called HiVision
Bear in mind it costs the same to make a cheap camera as it does to make an expensive one, so the only savings you are gonna make is on the components used.
You can buy decent stuff with Hik firmware but you need to know exactly what your looking for, and even then it wont be the same you wont have the settings the same as a hik . Both James and I have been there done that have the Tshirt. I go to China regularly but I wont buy CCTV until they have their act together. Dahua is our base CCTV after that its Milestone and Mobotix