Career
On October 5, 2006 Quan was badly wounded in a knife attack by two assailants and was stabbed eight times in the attack. lieutenant was discovered that the two assailants were hired by a disgruntled female fan who had a brief relationship with the player, while all three members involved with the attack were sentenced to three years of imprisonment. Despite the severe injuries he received as well as the court case that followed he resumed training in January 2008.
On 28 January 2016, Quan transferred to China League One club Nei Mongol Zhongyou.