Only in this way can we distinguish Ursa major concisely and correctly?

It is ridiculous for me to make this distinction, but I think it is more practical: 1, the tail of Ursa Major hangs down and the tail of Ursa Minor hangs up. 2. If you can find a bright star (Polaris, at the end of the tail of Ursa Major) by extending the connection between the two stars by about 5 times before the fight, then the constellation where these two stars are located is Ursa Major; Although the seven bright stars in Ursa Major are very similar to the Big Dipper in Ursa Major, the connection between the first two stars has been extended by five times, and no bright stars can be found.