A MAN who took part in the kidnapping of a businessman and half stripped and photographed his wife to try to force him to pay a $3 million ransom, failed to convince the Court of Appeal his conviction was wrong. The court held that the issue for the jury was to decide whether Wong Hing-tong was correctly identified as the man who had collected the ransom, and that he had been fairly tried. While there were some minor inaccuracies in the trial judge's summing-up, they were to be expected in an elaborate summing-up spanning 43 pages of print. The minor errors did not render the verdict unsafe or unsatisfactory, held the court, comprising Acting Chief Justice Mr Justice Silke, Vice-President Mr Justice Macdougall and Mr Justice Litton. Wong, 30, had denied a charge of conspiracy to forcibly take away 37-year-old Tse Yuen-lung for ransom in 1991. He was found guilty by a jury after a trial before Mr Justice Saied and was sentenced to 10 years' jail. The Crown had alleged that Mr Tse was seized at To Kwa Wan by three men who bound and blindfolded him before driving him to a hut in the New Territories and assaulting him. When his wife, summoned by telephone, was brought to the hut, she was half stripped and photographed before being freed to collect a $300,000 ransom - down from an original demand of $3 million. But when Mrs Tse delivered the money, three police officers were watching and later identified Wong as the man who had collected the ransom. Wong's counsel, Daniel Marash, contended that during the summing up, there were instances where weaknesses in the prosecution case had been ''watered down''.