According to historical records, Qianlong appeared in the northeast for about a week in thirty-five years? Red sky? Phenomenon is actually a very normal astronomical phenomenon, called magnetic storm. At that time, people thought it was a vision from the sky because of underdeveloped technology, but with the development of modern technology, people's understanding of astronomical phenomena became more and more profound. What about that era? Red sky? This phenomenon also has a scientific explanation. Magnetic storm is actually a natural phenomenon, because the drastic change of the sun leads to the change of the earth's magnetic field, so it appears? Red sky? Vision. Through the continuous research of scientists, we know that there are many novel things on the surface of the sun, such as sunspots, coronal mass ejections and flare explosions. Among them, when a flare breaks out, generate can emit the maximum energy in a short time, emit extremely strong electromagnetic radiation from the inside of the sun, and release many protons from the inside of the sun. When the electromagnetic radiation generated inside the sun and the charged particle stream impact the earth's magnetic field at the same time, the earth's own magnetic field will change its direction and intensity due to the impact, and at the same time interact with atmospheric molecules in the sky to produce Lux light. Because of the intense activity of the sun, the energy released is quite sufficient, so there will be nine days to dry up for 35 years? Red sky? Phenomenon. At that time, Qin was very nervous after learning about Chitianhua. According to historical records, people regard the red sky as a good omen, which indicates that the Qing Dynasty will get better and better. However, some people think that this is a harbinger of a catastrophe. However, no matter which statement is wrong, these statements are caused by their superstition. In fact, it is only a phenomenon caused by a violent solar activity.