By Wally Pyrah RACING in Hong Kong is coming thick and fast in the closing weeks of the season, with Sha Tin hosting racing for the second time this week, and its 10-race programme on Saturday features a number of exciting prospects who will be looking to end their current campaign on a high, before resting for their summer-break. Top of the list has to be the John Size-trained The Winnabe, who puts both his reputation and unbeaten record on the line, when lining-up in the Chow Silver Plate (1.10pm), a handicap over seven furlongs. The son of Caravaggio has plenty of potential, judged on his t…