ZHENG Weinjun thought nothing in golf could ever match the experience of watching Greg Norman in action at Augusta National in the 1989 US Masters. However, after Friday's Johnnie Walker Skins Games at the Shanghai Country Club, Zheng was happy to admit he had been wrong. ''This is without doubt the proudest day of my golf career,'' said the 27-year-old amateur from Zhongshan Hot Spring Golf Club. Zheng, the 1987 China Open amateur champion, was selected to represent his country in the Skins Game alongside South Korean Choi Sang-ho, legendary Taiwanese Lu Liang-huan . . . and Norman. ''Playing golf with Greg Norman is not something I thought could ever happen to me,'' said Zheng, who after early stage fright produced a succession of good shots on the back nine. The highlight of his day came at the long par-five 13th where a pinpoint approach left a four-foot birdie putt. After watching his rivals miss their birdie chances, Zheng coolly slotted his putt to claim a ''skin'' worth US$2,000. As an amateur, Zheng is not allowed to receive cash prizes and the money was donated to the Zhongshan Hot Spring Golf Club Development Fund to promote junior golf. Norman, who gave advice to Zheng during their round, said: ''He was very impressive. I think he needs to refine his swing a little and he also has to be prepared to work hard at his game.'' Despite these words of encouragement, Zheng was disappointed with his display. ''I promise to do better in the future,'' he said.