Tianshu, Tianxuan, Tianji, Tianquan, Yuheng, Kaiyang, Yaoguang. The first four stars are called "Dukui", also known as "Xuanji"; the last three stars are called "Dou Lao" and "Dou Handle". These seven stars are Ursa Major α, β, γ, δ, ε, ζ, and η. Except for Tianquan δ, which is a third-magnitude star, the other six are all second-magnitude stars. Polaris can be found when the line connecting Tianxuan β and Tianshu α is extended about 5 times. Therefore, β stars and α stars are also called "pole stars".