A Vampire, Probably

或許是魔鬼

Also known as 肯定是吸血鬼吧, 青年化妝師, The Young Mortician

A high school student named Ji Qing kills his classmate. After being released from prison, he begins working at a funeral home to learn embalming, seemingly to start his life over. During this time, he lives under the supervision of a social worker, Mr. Zhang, for three months. While Mr. Zhang appears ordinary and by-the-book to everyone else, Ji Qing senses something mysterious about him. He sneaks into Zhang’s home to spy on his private life, planning to reveal to him the secrets he has learned from the spirit world.