Bai Hongguan is a natural phenomenon. A white rainbow passes through the sun. "Bai Hong" is an atmospheric optical phenomenon, which occurs in winter when the temperature is extremely low and the sun is shining.

Bai Hongguan told the story of solar halo. It is said that in ancient times, when Nie Zheng assassinated South Korea and Jing Ke assassinated the King of Qin, the sky was covered with white Changhong. In fact, solar halo is just an atmospheric optical phenomenon. Light of various colors from different directions refracts into people's eyes, so we see a halo around the sun.