In September 1970, under the leadership of Sister Marie Pauline Wong, the first Principal and Supervisor, the school began its teaching at Sing Yin Secondary School, which kindly shared some of its classrooms with our school. The first intake consisted of four Form 1 classes and seven staff members.
 

By September 1971, the construction of the school building completed. Students of Forms 1 and 2 started lessons at St. Paul's. On 2 May, 1972, the school was officially opened by Lady MacLehose, and blessed by Bishop Frances Hsu.