By Wally Pyrah SHA TIN in Hong Kong hosts a 10-race programme on Sunday, with half-a-dozen contests on turf and four races on the all-weather surface. It hasn’t been easy for bettors in the territory recently, with numerous long-priced winners during the Chinese New Year Festival week, at both Sha Tin on Monday and Happy Valley on Thursday. With only three winning favourites from 20 races at both tracks, and plenty of short-priced favourites sunk without trace, racing fans will be looking for some respite when the action starts at 5.00am. The feature race on the card, the Class Two TVB Cup (8….