Racing over a shorter distance may help Har Har Heart to the third win of his last four starts in Wednesday’s $166,875 Tsam Sha Tsui Handicap at Happy Valley Racecourse in Hong Kong. But the 5-year-old gelding must hold off a late threat from the speedy High Volatility. Those two geldings have appealing form in the Tsam Sha Tsui Handicap, which is about a mile and 50 yards on turf and is the last of eight races at Happy Valley. Har Har Heart, who will be ridden by leading rider Joao Moreira, won consecutive starts in handicaps at about a mile and 50 yards at Happy Valley in February and March before a third-place finish at 1 1/8 miles on turf March 28. Trained by John Size, Har Har Heart has won 3 of 8 starts during the current Hong Kong season, which began in September. High Volatility has raced at a mile and 50 yards at Happy Valley in his last three starts, all in handicaps, winning by a length on Feb. 7, finishing second by a short head on Feb. 21, and fading from the lead to finish fourth on March 14 in his most recent start. Zac Purton, who was aboard for the Feb. 7 win, regains the mount for the first time since that race. High Volatility will carry 121 pounds, three more than Har Har Heart. California Joy and Top Laurels are the joint highweights at 128 pounds. California Joy was assigned 133 pounds, but apprentice jockey Jack Wong claims five pounds. California Joy was eighth in his last two starts, and is winless in three races since a narrow win by a head in a seven-furlong handicap at Sha Tin Racecourse in December. Wednesday’s race is a drop in class for California Joy, who has won once in 10 starts this season. Top Laurels was the 10-1 winner of a handicap at about a mile and 50 yards at Happy Valley in November, but is winless in his last three starts. Sixth in his last start on March 14, in the same race as High Volatility, Top Laurels is a longshot with something to prove on Wednesday.