If we study security monitoring, I think we can study it from three aspects: 1, front-end 2, back-end 3 and monitoring scheme. The front-end recommends studying in Axis official website, which is the industry standard of network cameras. Just land in Hikvision official website at the back end. The simple one is NVR, and the big projects are video servers and streaming media servers. After you have a little understanding of the front and back ends, you can find a plan. Look for a big community, school and bank plan, preferably online, because this is a trend.