Complex sentence: Bai started his football career for China League Two club Dalian Sidelong in 2001 where he played as third choice back up goalkeeper to Sun Shoubo and saw the club to win promotion to second tier in the same season.
Split into simpler sentences: Bai started his football career in China League Two club Dalian Sidelong in 2001. He played as back up goalkeeper for Sun Shoubo and followed the club to win promotion to second tier in the same season.