Yesterday, I met an “an” who didn’t know what to do. The environmental monitoring had nothing to do with him. In the afternoon, because there was no signal in Building 2, the positioning showed over 50 meters, and I couldn’t submit it. This was just the beginning of the trouble. They said the system was unstable and asked me to change the Watermark Camera. They didn’t figure out what the problem was, and it was really frustrating.