JUST what was fashion designer Flora Cheong-Leen (right in orange pants) up to in the close confines of this mini-van on the mean streets of Shanghai? Could it be that fitness fanatic Cheong-Leen, who exercises two to three hours daily, was catching up on her tongue and eye workout? A warm-looking P.S. reporter, looking somewhat embarrassed next to her, knows the real reason for her facial contortions, but a gentleman - and even a newspaper columnist, on occasion - must be discreet.