1998 and Zhang Wei won the men's doubles competition in the Swiss Open; In the same year, he became the main runner-up of the men's team in the Asian Games and the runner-up of the men's doubles in the Asian Championships.
1999, partner Zhang Wei became the main player of the 6th Sudirman Cup; In the same year, partner Gao Kun participated in the All England Open, and they participated in the competition in the form of a combination for the first time;
In August, 2000, Zhang Jun and Gao Kun participated in the badminton mixed doubles competition in Sydney Olympic Games, and won the first mixed doubles gold medal for China in Olympic history. In the same year, he won the mixed doubles of badminton in Thailand Open and World Championships.
200 1, and Zhang Jun won the mixed doubles runner-up in the Korean Open; British Open mixed doubles champion, third place in Japan Open.
On June/KOOC-0/65438+/KOOC-0/October/KOOC-0/7, 2002, Gao Kun and her host players beat Gunagon and Sarah Li 2-0 in the Asian Badminton Championships held in Thailand.
In 2003, Zhang Jun and Gao Kun won the Japanese mixed doubles championship and the All England Open championship together.
On August 17, 2004, Zhang Jun and Gao Kun defeated Britain's Robson and Ames by 2: 1 in the mixed doubles final of the Athens Olympic Games, and won the second badminton gold medal for China in this Olympic Games, becoming the first champion group to defend the mixed doubles in Olympic history. In the same year, he won the double champion of Malaysia Open.
In 2005, Zhang Jun and Gao Kun won the Sudirman Cup final together. In the same year, they missed the Badminton World Cup because their partner Gao Kun was injured; In the same year, after the Sudirman Cup, Zhang Jun's status gradually declined, and the results of two consecutive World Championships were bleak, and the ranking of points began to decline.
In March, 2006, Zhang Jun and Gao Kun made their debut in the 2 1 competition. In the final, they lost to Xie and Zhang with 1-2. In the German Badminton Open, the mixed doubles champion beat teammate Xie He Zhang 2-0 to win the championship. In the same year, he won the mixed doubles championship in Malaysia Open.
At the end of 2006, due to the adjustment of 2 1 new competition system, Zhang Jun no longer mixed doubles with Gao Kun.
In 2007, Zhang Jun officially retired as a teaching assistant of women's doubles.
From June 5438-/KLOC-0 to October 65438, 2008, he became the head coach of the men's doubles of the national badminton team.