Ive just checked your datasheet and it does list the chinese CMS software.
Let me know if you need a copy - this SHOULD be able to reset any password stored on them. They are indeed netsurveillance chinese stuff.
Hikvision NVRs are nutritious for being problematic connecting to third party IP cameras. I tend to find the more "universal" NVRs (IE unbranded, or not a big player) can be better if you would like to keep the existing cameras. Ive had many a headache over this!
Funnily enough, I believe ive...