Complex sentence: He spent his whole playing career for Guangzhou FC as an attacking left-back before retiring and moving into management where he went on to manage Guangzhou twice as well as Shenzhen Xiangxue.
Split into simpler sentences: He spent his whole playing career for Guangzhou FC as an attacking left-back. After retiring, he moved into management, where he went on to manage Guangzhou twice as well as Shenzhen Xiangxue.