Complex sentence: Guangzhou Evergrande's first participation in Asian competition was during the 2012 season, when they competed in the AFC Champions League, their first match was against Jeonbuk Hyundai Motors, won by Guangzhou.
Split into simpler sentences: Guangzhou Evergrande's first participation in Asian competition was during the 2012 season, when they competed in the AFC Champions League. Their first match was against Jeonbuk Hyundai Motors, won by Guangzhou.