You can't comment on something that you can't read.
Write at least a summary of any article written in anything besides English as courtesy since I believe that is the rule at this site.
歼-20歼击机翼展12.88米(wingspan 12.88 meter),机高4.45米(height 4.45 meter),空重17000公斤(empty weight 17000 kg),发动机为涡扇-15(engine WS-15?),最大起飞重量37000公斤(max take off weight 37000 kg),最大飞行速度3062.7公里/小时 (max speed 3062.7 km),最大航程6000公里(max range 6000 km)