When does "the moon sets at the willow tips" mean?

Ouyang Xiu wrote in "Raw Tea on the Edge of the Stream": Willow tips on the moon, people meet after dusk. It can be seen that when the moon rises to the willow tip, it should be around dusk.

Relative to the appearance of the sun, the time when the earth can theoretically observe the moon phase is:

● The moon rises and falls → When can the earth actually observe the moon phase?

The new moon (the first day) rises and sets at 6 o'clock → 18 o'clock, but it doesn't see 0 o'clock all night?

Comet Moon (the third and fourth day) rises at night and then sets at 9: 00 → 21:18 → 21:3 hours?

The first quarter moon (seventh and eighth day) rises late and then sets at 12 →24: 00, that is, 0: 18 →24: 06?

The convex moon (10 day, 1 1 day) rises late and then falls on 15 →3: 00 18 →3: 09 hours?

Full moons (15, 16) rise and fall 18 →6: 00 (visible all night) 18 →6: 00 12 hours?

The convex moon (19, 20th) rises early and sets at 2 1 →9: 00 →6: 09?

The last quarter moon (22nd and 23rd) gets up early and sets at 24: 00 → 12: 00 →6: 06?

Comet Moon (26th and 27th) rises at 3 o'clock → 15 o'clock at 3 o'clock →6 o'clock for 3 hours?

Every phase in the first half of the month rises during the day and sets at night. In the second half of this month, the moon rises at night and sets during the day. Therefore, the first half of the moon phase can be seen after sunset and the second half can be seen before sunrise and dawn.