TERTIARY students yesterday announced their support for changing the university system into four years but warned this should not be done at the expense of secondary education. Hong Kong Federation of Students called for an overall review of the education system, including the examination oriented education in the secondary level. Federation spokesman Tam Wai-pang said: 'The discussion of university system changes must take secondary students' interests into consideration and aim to maintain quality of secondary students. 'We support the change from three to four years for the undergraduate courses, but the government cannot take this as an excuse to reduce resources for secondary education,' added Mr Tam. The seven tertiary principals proposed to cut the seven years of secondary education to six years while adding one more year in the university to enhance tertiary students' general education.