Now with something like NVR, we would not worry about monitoring the problem, I think I still need some technical problems for my friends, I actually think about things such as NVR, I really don’t know how to use, so I want to see how I can do not go now, NVR has been such a good thing, I know what should I do, in fact, you don’t know how to do it, then you can know how to do, so that you will know how to do what you should in fact, I think NVR is really solve the mall or other public places of the problem.