Three walls of official books

Three areas near the North Celestial Pole: Ziwei Garden, Taiwei Garden and Tianshi Garden. The division of walls is not strict and clear. Wei Zibi generally includes Ursa minor, Draco, Panthera, Cepheus, Cassiopeia, Ursa major, Aries, Canis, Auriga and so on. Taiwei Courtyard is equivalent to the following constellations: Leo, Backrow, Virgo, Canis Major, Ursa Major and Little Lion. Tianshiyuan is relatively closer to the Milky Way in summer and autumn, including Ophiuchus, Hydra, Shield, Eagle, Five Immortals and Northern Corona.