通行證

To go through; to connect or communicate; to be open or clear; to know well; expert; common; fluent; smooth; classifier for letters or calls.

To walk, go, travel, move; to do, perform, capable; behavior, conduct; a line, row; a trade, profession; a business firm; a measure word for rows or lines.

Proof; evidence; to prove or demonstrate; a certificate or testimonial; a symptom of illness (often written as 症).