Apple Chief Executive Officer Tim Cook (L) visits the iPhone production line at the newly built Foxconn Zhengzhou Technology Park in Zhengzhou, Henan province in this March 28, 2012 handout photo. REUTERS/Apple/Handout (CHINA - Tags: BUSINESS POLITICS EMPLOYMENT SCIENCE TECHNOLOGY) FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY. IT IS DISTRIBUTED, EXACTLY AS RECEIVED BY REUTERS, AS A SERVICE TO CLIENTS