shanghai chinas world silvermedallist high jumper zhang guowei renowned for his flamboyant twerking celebrations has stunned fans by announcing his retirement aged 28the colourful zhang won silver at the beijing 2015 world championships and also competed at the london 2012 and rio 2016 olympicsim sorry i really cant jump anymore ive decided to retire zhang told his 34 million followers on the twitterlike weibo on sundayhowever his form and fitness tailed off after his 2015 triumph and his seasons best performance of 228m set in italys siena in february was some way short of the tokyo 2020 olympics qualifying standard of 233mthe tokyo games were last week moved to the summer of 2021 because of the coronavirus pandemiczhang was suspended in march last year for an undisclosed amount of time for breaking chinese athletics strict rules on commercial activitieshis return to the national team was blighted by more mediocre form and bursitis an inflammation of the joints the peoples daily saidbut zhang still had many fans in china because of his quirky character celebrating successful jumps in an exuberant fashion twerking and striking poses before sprinting towards spectatorshis surprise retirement was a trending topic on weibo on monday with many expressing shock and disbeliefthe hashtag zhang guowei retires was read 260 million times as of monday afternoon on weibobig brother aprils fool day has passed wrote one fan