The moon is in the suburbs of autumn. Guess a number?

Mid-Autumn Festival color separation is not an idiom, but a well-founded statement. Feather rotation implies that you combine yourself into a reasonable one. The first word is (autumn), the third word combination is (autumnal equinox), and the second and fourth combination is (neutral color). The autumnal equinox ranks 16 among the 24 solar terms, and the neutral color is the two-color ball.