<p>Zhang Shangwu performed gymnastic stunts at a metro station in Beijing, showed pictures on a microblogging site, the Shanghai Daily reported. <br /><br />At age 18, Zhand won two gold medals at the 2001 Summer Universiade in Beijing. <br />Zhang was training for the 2004 Athens Olympics when he sustained an injury that forced his retirement in 2003.<br /><br />Langfeng, who had made the post on the microblogging site, said Zhang had to give up his professional career when he ruptured a tendon in his heel. <br /><br />He tweeted that Zhang performed some of the moves which used to earn him gold medals.</p>
<p>Zhang Shangwu performed gymnastic stunts at a metro station in Beijing, showed pictures on a microblogging site, the Shanghai Daily reported. <br /><br />At age 18, Zhand won two gold medals at the 2001 Summer Universiade in Beijing. <br />Zhang was training for the 2004 Athens Olympics when he sustained an injury that forced his retirement in 2003.<br /><br />Langfeng, who had made the post on the microblogging site, said Zhang had to give up his professional career when he ruptured a tendon in his heel. <br /><br />He tweeted that Zhang performed some of the moves which used to earn him gold medals.</p>