A native of Changhua County, Yen Yu is a graduate of Taiwan Police College, a former police officer, and a member of the Crime Writers of Taiwan. Proficient at incorporating social issues into his writing, his works span a range of genres, from crime to romance, sci-fi and fantasy to comedy, though his police novels remain his most representative works. In 2022, he was awarded the Mirror Fiction Million Dollar Award. A number of his works have already sold rights for television and film adaptations.