Daily Chinese Idiom Guessing Game
An opportunity that can be exploited; a chance to take advantage of something.
可以利用的时机。
《晋书·吕纂传》宜缮甲养锐，劝课农殖，待可乘之机，然后一举荡灭。”
When the manager was away, the dishonest employee saw a 可乘之机 to steal office supplies.