![Apple CEO Tim Cook takes the stage during Apple\'s Worldwide Developer Conference (WWDC) at the San Jose Convention Center in San Jose, California, the United States, June 4, 2018. (Xinhua)](http://www.ecns.cn/hd/2018/06/05/23b99d7c955a46ea9d74f14bb0ffc05c.jpg)
Apple CEO Tim Cook takes the stage during Apple's Worldwide Developer Conference (WWDC) at the San Jose Convention Center in San Jose, California, the United States, June 4, 2018. (Xinhua)
![A participant takes photos during Apple\'s Worldwide Developer Conference (WWDC) at the San Jose Convention Center in San Jose, California, the United States, June 4, 2018. (Xinhua)](http://www.ecns.cn/hd/2018/06/05/16056845bdcd4dd287cd03e456b6396f.jpg)
A participant takes photos during Apple's Worldwide Developer Conference (WWDC) at the San Jose Convention Center in San Jose, California, the United States, June 4, 2018. (Xinhua)
![Apple CEO Tim Cook takes the stage during Apple\'s Worldwide Developer Conference (WWDC) at the San Jose Convention Center in San Jose, California, the United States, June 4, 2018. (Xinhua)](http://www.ecns.cn/hd/2018/06/05/10ea317c3f4b4db8a406c3c88c2d03df.jpg)
Apple CEO Tim Cook takes the stage during Apple's Worldwide Developer Conference (WWDC) at the San Jose Convention Center in San Jose, California, the United States, June 4, 2018. (Xinhua)
![The Apple\'s Worldwide Developer Conference (WWDC) is held at the San Jose Convention Center in San Jose, California, the United States, June 4, 2018. (Xinhua)](http://www.ecns.cn/hd/2018/06/05/3c8d1066303640748bbda8fdecd98f2b.jpg)
The Apple's Worldwide Developer Conference (WWDC) is held at the San Jose Convention Center in San Jose, California, the United States, June 4, 2018. (Xinhua)
![The Apple\'s Worldwide Developer Conference (WWDC) is held at the San Jose Convention Center in San Jose, California, the United States, June 4, 2018. (Photo/Xinhua)](http://www.ecns.cn/hd/2018/06/05/5cc78e38d58e4d0a81095dc593a0bc30.jpg)
The Apple's Worldwide Developer Conference (WWDC) is held at the San Jose Convention Center in San Jose, California, the United States, June 4, 2018. (Photo/Xinhua)