Just another Warning sigh with exclamation mark. I made it symmetric with some gradient. The file in wiki (commons.wikimedia.org/wiki/File:Warning.svg) is not so symmetric.
警告牌
alert、carefulness、Caution、danger、exclamation mark、Hazard、Industry、protection、safeguard、safety、Sign、Warning、Warning Sign
警報、小心、警告、危險、感嘆號、冒險、行業、保護、保障、安全、標誌、警告、警告牌
資料來源：openclipart ( https://openclipart.org/ )