YSK: If you're sending anything solid in an envelope by mail (cards, drivers license, rings, money, etc) you should tape it to a piece of paper
from /r/YouShouldKnow
YSK: 如果你要用信封郵寄任何固體的東西（卡片、駕照、戒指、錢等），你應該把它粘在一張紙上。
YSK: 如果你要用信封郵寄任何固體的東西（卡片、駕照、戒指、錢等），你應該把它粘在一張紙上。
YSK: If you're sending anything solid in an envelope by mail (cards, drivers license, rings, money, etc) you should tape it to a piece of paper
from /r/YouShouldKnow