See yesterday when I saw his friend, the mood is not very good, I asked him what is the matter, I know he is sure to open their own companies encounter bad things, but he told me is that he does not know what is going on inside the company, especially the NVR easy problems, and he has been changed several times, but still with a bad, heard him say this, I think, he might buy the quality is not good, then I introduced him to a brand of NVR, because we have been this brand of NVR, I think it is very good, I want to make friends to buy a brand like NVR try, he heard this saying, friends also decided to buy such a NVR to try it.