THE Cross-Harbour Tunnel Co says net profit rose 6.4 per cent to $241.6 million in the year to December, up from $227.04 million. A spokesman for the company, in which Wharf (Holdings) has a 26.7 per cent stake, attributed the growth to heavier flows through it tunnels of buses and lorries, which paid higher tolls. Usage by cars, in contrast, showed a slight drop. Income from the auto-pass system in four of the company's tunnels - the Cross-Harbour Tunnel, Lion Rock Tunnel, Eastern Harbour Tunnel and Aberdeen Tunnel - also boosted net profit, the spokesman said. 'We had 75,000 subscribers last year and the number is increasing all the time.' The company was looking for opportunities in China, including with auto-pass services, he said. It announced a final dividend of 37 cents and a 6.7 per cent rise in earnings per share to $1.26, compared with $1.18. Turnover grew 5.5 per cent to $768.15 million from $728.26 million.