The scale of China's Internet of Things industry is approaching one trillion
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One night when I got home from work, a security guard came on patrol and suddenly shouted to me: Stop! What for? I just got off work.... Security guard: What are the colors of CMYK? Me: Cyan, magenta, yellow, black. Security guard: You can go now. I was surprised. Me: Why do you ask such a question? Security guard: I was still hanging around in the community late at night, looking bitter, either a thief or a designer.