This study attempts to bring together two lines of enquiry into teacher emotion, emotional labor and emotion regulation, arguing that the process of teachers' emotional labor is their regulation of feelings and expressions to achieve professional goals. Through the analysis of qualitative data collected from two projects concerning teacher emotion in China, the study summarizes three categories and seven strategies adopted by Chinese teachers to regulate their emotions in the classroom. Teachers regulate their emotions by genuinely expressing their feelings in teaching, along with surface acting and deep acting. These emotion regulation strategies help teachers fulfill their professional goals, and may therefore influence their well-being. The influence of Chinese culture on the emotion regulation of teachers, and the teacher-student relationship in China, are also discussed.