Career
She plays for Shanghai chess club in the China Chess League (CCL). In December 2004, Ju Wenjun came joint second in the Asian Women"s Chess Championship in Beirut. In October 2007, she came joint fourth in the 2007 FIDE Women"s Zonal 3.5 Tournament in Tianjin and qualified for the 2008 Women"s ship.
In the Women"s ship 2008 she was knocked out in the second round by Antoaneta Stefanova 1–3.
Two years later, in the Women"s ship 2010 she reached the quarter-finals. In October 2011 she took the second place at the Nalchik leg of the FIDE Women"s Grand Prix 2011-2012 with 7/11, ranked only after her compatriot Zhao Xue.
Her performance was enough to acquire her third and final Grandmaster norm. However, one of the third General Motors norms was missing the signature of the arbiter, disqualifying her for consideration for the Grandmaster title.
She was the Number. 2 ranked under-21 female player in the world on the November 2011 Top 20 Girls FIDE rating list.
She had been on the FIDE Top 20 Girls list from January 2007 to November 2011. During June 18 to July 2, 2014 in the 5th stage of the FIDE Women"s Grand Prix 2013-2014 held in Lopota, Georgia she finished jointly second with Elina Danielian and a 7/11 score (+5 -2 =4, TPR 2622). This marks her fourth General Motors norm.
In the 6th stage of the FIDE Women"s Grand Prix 2013-2014 held in Sharjah, United Arab Emirates, from August 24 to September 7, 2014 she placed joint first with Hou Yifan with a 8.5/11 score (+6 =5, TPR 2695).
In the 4th Quarter of 2014 Presidential Board meeting in Sochi, Russia, her General Motors title was approved. With five successful General Motors norms, including three norms from the Women"s Grand Prix (1 from each series), she is now a fully fledged grandmaster, China"s 31st Grandmaster and the 31st woman to hold the title.
In the same year she tied for first with Lei Tingjie in the 4th China Women Masters Tournament in Wuxi.