WGM (2009); GM (2011); Chinese Women’s Champion (2010 & 2014); Women's World Champion (2018).
At the Chess Olympiad (Women) (2010), Wenjun won individual silver on board 2 and her first GM norm. She won her 2nd GM norm at the 1st Hangzhou Women's GM Tournament (2011), and her 3rd GM norm came with her second place (with 7/11) at the FIDE Women's Grand Prix Nalchik (2011). She produced 3 more GM norms before her application for the grandmaster title was forwarded to FIDE: at the Women Grand Prix Jermuk (2012), the Dubai Open in 2013 and the FIDE Women's Grand Prix Lopota (2014). The effective date of her title is 21 October 2011, dated to the final round of the Nalchik event, as she had already reached a rating of 2500 a couple of years previously.
Wenjun won the Chinese Championship (Women) (2010). She qualified for the FIDE Knock-out Women's World Championship (2012), and defeated Iranian WGM Atousa Pourkashiyan, US IM and WGM Anna Vitalyevna Zatonskih, Ukrainian GM Natalia Zhukova and compatriot WGM Huang Qian to reach the semi-final. There she played and lost to Ukrainian IM and WGM Anna Ushenina in the first set of rapid game tiebreakers. In 2014 she won the Women's Chinese Championship for a second time with a score of 8.5/11.
Wenjun was =5th at the Women Grand Prix Geneva (2013), picking up her first points in the women's Grand prix series, some 75 points. 6th place at the FIDE Women's Grand Prix Tashkent (2013) earned her another 70 Grand Prix points that accrued to 6th place, but was not enough to keep her in meaningful contention. Nevertheless, in June 2014, she was =2nd in the FIDE Women's Grand Prix Lopota (2014) and in September 2014 she went one better by placing =1st alongside Yifan Hou at the FIDE Women's Grand Prix Sharjah (2014). She managed to place 3rd in the Women's Grand Prix series for 2013-14 with 340 points, 40 points behind the runner-up Koneru Humpy.
Wenjun played in Zonal 3.5, a qualifier for the (open) World Cup 2015, in November 2014, and placed 8th with a score of 7/11, losing 14 rating points for her pains.
In May 2018, she challenged the Women's World Champion of 2017, Tan Zhongyi, in the Women's World Championship (2018) that was played in Shanghai (games 1-5) and Chongqing (games 6-10). She took the title by winning the 10 game match by 5.5-4.5 (+3 -2 =5), becoming the 17th Women's World Champion.
<Chinese League> Ju Wenjun has played for the Shanghai team every year since 2005 inclusive, helping her team win the gold medal in 2008, 2009 and 2012, the silver medal in 2011 and bronze in 2005, 2007 and 2013.
<National Team> In March 2013, she shone on board 1 for the Chinese team at the
Ju Wenjun's highest rating to date was 2582 in October 2014, when she also reached her highest ranking, #3 amongst women.