Mao Anying was killed in a bombing run on 25 November 1950. He was assigned to a place that the then PVA commander felt would be safe from UN air raids. He was supposedly in a makeshift shelter near some caves when the bombs struck. Some rebel groups or anti-government people say that the man was cooking food in daylight, which was against Army regulations, and that gave away their position to the enemy.
Some Chinese citizens and groups who oppose Mao Zedong commemorate the anniversary of Mao Anying’s death by eating egg fried rice. According to some sources, on the morning of 25 November 1950, Mao Anying, alongside staff officers Gao Ruixun and Cheng Pu, cooked egg fried rice for breakfast in the office of Peng Dehuai, despite orders only to cook at night for fear of American air raids. It is alleged that their preparation of that meal drew the attention of American bombers, contributing to the deaths of Mao and Gao. Taken from Wikipedia.