By Wally Pyrah BANK on trainer Danny Shum to have a change of fortune at Happy Valley in Hong Kong, when the city track hosts a nine-race programme starting at 11.40am on Wednesday. 63-year-old Shum has been one of the most consistent performers in the territory over the past 20 years, training over 800 winners, and is renowned for his handling of Hong Kong’s legendary champion Romantic Warrior. However, after a flying start to the season, the stable have come to a stuttering halt in the past month, with no winners at the last six meetings after a sequence of 37 losers. Shum has too many good …