Zhao Jun (simplified Chinese: 赵骏; traditional Chinese: 趙駿; pinyin: Zhào Jùn; born December 12, 1986 in Jinan, Shandong) is a Chinese chess Grandmaster. In 2004, he became China's 19th Grandmaster at the age of 17.
Zhao Jun plays for Shandong chess club in the China Chess League (CCL). He is ranked 11th in China .
He achieved his first GM norm at the February 2004 Aeroflot Open in Moscow where he scored 5/9 (tpr 2613). His second norm was achieved at the April 2004 China Men's Team Championship in Jinan where he scored 7/10 (tpr 2652). His third norm was achieved at the November 2004 World Junior Chess Championship in Cochin where he came third scoring 9.5/13 (tpr 2633).
Playing under the handle CK-324, he earned a spot in the 2006 FIDE Blitz Championship by winning a qualifying tournament on the ICC.
He competed in the Chess World Cup 2007 where he beat Pendyala Harikrishna in the first round and achieved a performance rating of 2668 despite losing to Liviu-Dieter Nisipeanu in the second round.