Racehorses rehearse at the Happy Valley Racecourse on June 28, 2017, to prepare for a grand race day to mark the 20th anniversary of Hong Kong's return to the motherland on July 1.

　　2017年6月28日，市民在跑马地马场为自己中意的马匹和骑手助威。今年香港马季的赛事日数首次增加至88次。