Chef Wang is one of my favorite YouTube channels, and a few weeks ago he got into trouble with the system. HERE is the CNN version of the story. HERE'S a slightly biased video explaining the cultural implications a bit more.
My 5 second summary: A long-forgotten Chinese general was hiding in the mountains during a war, and decided to cook egg fried rice, which sent off smoke plumes that alerted the enemy of his whereabouts. Stupid mistake. So, if you cook egg fried rice near the end