After graduating from university he returned to his hometown to teach at Nanlung Junior High School. In his first year there, Liu began out of pure interest to go birdwatching in Yellow Butterfly Valley.
畢業後回到家鄉南隆國中教書的第一年，劉孝伸純粹因為興趣，開始到黃蝶翠谷賞鳥。