THE University of Hong Kong (HKU) has been urged to introduce localisation among its staff, following the revelation that more than half of its teaching employees are expatriates. Meeting Point legislator Fred Li Wah-ming said the policy should be one of HKU's basic principles in recruitment. While acknowledging the need to pursue academic excellence, Mr Li, a former Baptist College lecturer, said he was, ''a bit uneasy about the figure. I think more local lecturers can be recruited''. With 54 per cent of HKU's 727 teaching staff on expatriate terms, it has the biggest team of expatriate staff among Hong Kong's tertiary institutions. Of 393 employed in overseas terms, 44 are at professor grade - more than two-thirds of the number of local professors. A spokesman for the university said localisation was not on the university's agenda, as it always looked for academic excellence when searching for teaching staff. Asked why the university had a higher level of expatriates than other tertiary institutions, she said: ''It is because our university always aims at maintaining international academic excellence.''