China’s Sun Yang claims gold in 800m freestyle at FINA World Championships

China's long-distance expert Sun Yang retained his 800m freestyle title at the world swimming championships on Wednesday. Subscribe to us on Youtube:    / cctvnewsbeijing   Download for IOS: https://itunes.apple.com/us/app/cctvn... Download for Android: https://play.google.com/store/apps/de... Follow us on: Facebook:   / cctvnewschina   Twitter:   / cctvnews   Google+: https://plus.google.com/+CCTVNEWSbeijing Tumblr:   / cctvnews   Weibo: http://weibo.com/cctvnewsbeijing