How to Choose Bird's Nest — Form, Cleanliness and the Unit You're Actually Paying In
Why 燕盞, 燕條, 燕角, 燕餅 and 燕碎 are one material in five states of intactness, why the flawless white cup is the suspicious one, the 斤-versus-兩 pricing trap, and nine checks you can make with your eyes.