Complex sentence: After winning that award, she became a huge favorite for the crown; for the Miss Hong Kong pageant contests of 1996 to 2001, all winners of the pageant had also won the Miss Photogenic award.
Split into simpler sentences: After winning that award, she became a huge favorite for the crown. This was because for the Miss Hong Kong pageant contests of 1996 to 2001, all winners of the Miss Hong Kong pageants had also won the Miss Photogenic award.