This study explores the relationships between vocational interests and career maturity in the context of China. We tentatively hypothesize that realistic, conventional, and artistic interests have negative linear relationships with career maturity, whereas investigative, social, and enterprising interests have positive but curvilinear relationships with career maturity. Analyses of the data collected from 5,474 participants provide support for most of the hypotheses. Specifically, the results demonstrate negative relationships of realistic and conventional interests with career maturity, a U-shaped relationship of artistic interest with career maturity, and concave upward curve relationships of investigative, social, and enterprising interests with career maturity. These findings add to the literature on vocational interests and provide practical suggestions for individuals and career counseling practitioners.