Which one is better, the two-year postgraduate program at the University of Macau or the one-year postgraduate program at the Chinese University of Hong Kong?

In terms of time alone, there is no difference between one year and two years. It depends on which university you are more willing to spend this time at. In terms of majors and future employment, you must comprehensively consider the major you choose and compare the differences between the two schools in terms of teachers, teacher-student ratio, and teaching environment. If there are budget constraints, it also depends on how much tuition is at the graduate level for the major you choose. All in all, you can list every issue that needs to be considered and make a choice after comprehensive comparison.