信标

a signal

letter / mail / CL:封[feng1] / to trust / to believe / to profess faith in / truthful / confidence / trust / at will / at random

mark / sign / label / to mark with a symbol, label, lettering etc / to bear (a brand name, registration number etc) / prize / award / bid / target / quota / (old) the topmost branches of a tree / visible symptom / classifier for military units