Tell him directly that simple and rude methods may be the most effective. A colleague feels good about himself and likes to take other people's things without asking. It was particularly cold some time ago, and the company's heating was broken. When it gets cold during lunch break, just cover someone else's blanket. He covers other people's blankets when everyone is away. He didn't shout cold when everyone was around. This behavior is very disgusting. You can borrow someone once in a while if you want to be cold. Just let me know. I didn't say anything, and I knew I didn't bring more blankets when I was cold. On one lunch break, he said to the air that XXX won't lend him a cover today. Someone asked quietly, didn't you bring a quilt? His confident answer was yes, but it was too cold (cold face). Finally, I have to say bluntly that he was caught by the owner of the blanket behind him, and he said he wanted to borrow the quilt cover. The owner of the blanket told him that he was neat and didn't like being covered with quilts. Everyone's quilts are saved in the back.