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In ancient China, Yaoguang was also known as the Big Dipper and the Broken Army Star, and was regarded as one of the stars symbolizing good luck. Among them, the name "Broken Army Star" is the product of the combination of China's folk theory of Yin-Yang and Five Elements with astronomy, with strong elements of divination and fortune-telling.

Yaoguang, also known as Eta Ursae Majoris, English name: Alkaid? [ 1]? η UMa, also called defensive star in Chinese, is the seventh star of the Big Dipper, located at the extreme end of the bucket handle shape of the Big Dipper, and the easternmost star of the Big Dipper, located in Ursa Major. The flicker apparent magnitude has reached 1.86, etc. [2]? The 39th bright star in the whole day and the third bright star in the Big Dipper, with a spectral type of B3V, is a blue and white main sequence star.