This study explores the career concerns that confront mainland Chinese Master's students in Hong Kong, and identifies their needs for career support. Forty mainland Chinese students from a wide range of Master's programmes participated in semi-structured interviews, after which the qualitative data were subjected to phenomenological analysis. The results showed that most interviewees were uncertain about their career paths. The study contributes to the literature by applying the systems theory framework of career development to organize the various factors that give rise to career concerns into three systems: (1) individual; (2) social; and (3) environmental-societal. Four key aspects of the students' career support needs at the institutional level were also identified: information channels, relational networks, technical skills and practical experience. Based on the findings, we discuss the theoretical and practical implications for understanding the career concerns and meeting the needs of Master's students.