By Wally Pyrah RACEGOERS are in for a treat in Hong Kong on Sunday, when Sha Tin hosts a highly competitive 10-race programme, that includes the seasonal reappearances of a number of potential superstars. If that wasn’t enough to tickle the taste buds, the greatest galloper in the history of Hong Kong racing, Golden Sixty, makes his farewell appearance in front of his adoring fans, with a retirement ceremony taking place at 8.10am (watch on Sky Sports Racing) in front of the grandstand. Three-times Horse of the Year, and the pride and joy of the city, won 26 of his 31 starts, amassing over £17…