The Lunar Palace verse hands you the brightest possible image: a moon so clear it turns mountains and rivers into a mirror, light reaching thousands of miles. For a family question this is generous, but notice what the imagery actually shows. The moon does not act on the landscape; it simply illuminates what is already there. Drawing this stick on a household matter suggests the conditions at home are clearer to you right now than you have been admitting. The shapes of the relationships, who carries what, where the warmth gathers and where it thins — all of it is visible if you stop squinting.
Cai Zhongxing studied by moonlight because that was the light he had, and the verse pairs his story with a household that eventually shines together. The stick reflects a similar pattern in your own situation: one person's steadiness, probably yours, is doing more quiet work than the family acknowledges out loud. The grade is 上上 not because everything is resolved, but because the underlying constellation is sound. What the verse asks is whether you can let that light be seen at the dinner table instead of keeping it folded away as private effort.