Julien Leparoux makes his Hong Kong debut Wednesday night in the hothouse atmosphere of Happy Valley Racecourse in the heart of the bustling island city where he will represent the United States in the Cathay Pacific International Jockeys’ Championship. Leparoux will be one of three French-born riders in the four-race competition, joining compatriots Olivier Peslier and Christophe Lemaire as well as big-name jockeys from around the world like Johnny Murtagh, Ryan Moore and perennial Hong Kong champion Doug Whyte.