Rare rare (note: phoenix feathers, unicorn horns. Metaphor is a rare person or thing. Ji Guang Pian Yu (Note: Ji Guang: the name of the beast in ancient mythology; Feather: a hair. Metaphor preserved precious cultural relics. Footsteps in the empty valley (note: I heard footsteps in the silent valley. Metaphor is extremely difficult to get news, comments or interviews. ) very few (note: very few: describe a small number. Very rare, very rare. ) as rare as the morning star (note: sparse: sparse. As rare as the stars in the morning. A few. ) This is a drop in the ocean. (Note: figuratively, all good things are accepted, regardless of size. Rare treasures (note: rare treasures. ) It comes once in a blue moon. It is extremely rare to describe opportunities. There are only a handful (note: the number is very small, you can count it with your fingers. There are only a few fruits left (note: there are only big fruits left. Metaphor is the only person or thing that has survived because of the passage of time. ) priceless treasure (note: priceless treasure. Refers to something extremely precious. ) Rare treasures (Note:)