<h3>This is a no-stop sign. It usually appears in the parking lot next to the parking lot.After seeing this sign, you can't park your car here. Otherwise, you will be fined.</h3> <h3>This is the sign of caution. We usually see this sign next to the electric brake and the high voltage line.</h3> <h3>This is a sign not to smoke. We usually see this sign in public. See this sign, the smoker should not smoke, should go to smoking area to smoke.</h3> <h3>This is a sign forbidding climbing.It appears next to higher ground and higher climbing objects.Have you seen it?</h3> <h3>This is the sign of shenzhen metro in guangdong province. We usually see this sign in the subway station in guangdong province.</h3> <h3>There are many signs in the world. What else do you know?</h3>