**FILE** Sarah Ryan (left) and Shelby Knox of Change.org arrive Feb. 9, 2012, at the Apple store at Grand Central Terminal in New York to deliver petitions asking Apple to change its manufacturing practices and to address criticism of worker conditions at manufacturing partners operating in China. (Associated Press)
** FILE ** Chinese Vice President Xi Jinping attends a meeting with U.S. Vice President Joseph R. Biden Jr. and American and Chinese business leaders at the Beijing Hotel in Beijing on Friday, Aug. 19, 2011. (AP Photo/Lintao Zhang, Pool, File)
Celebrating at a November signing ceremony in Caracas, (from left) are Jorge Giordani, Venezuela's minister of planning and finance; President Hugo Chavez; and Zhan Xiaoquiang, China's vice minister of national development and reform. (Associated Press)
Undersecretary of State Maria Otero has expressed concern over "reports of violence and continuing heightened tensions in Tibetan areas of China." (Associated Press)
Brazil's state-controlled oil company expects to pump 4.9 million barrels of oil a day by 2020, and much of it will go to China. President Dilma Rousseff in November celebrated the delivery of one of four Brazilian-built oil-transport ships. (Associated Press)
Former Ambassador Jon Huntsman Jr. became the target of an anti-American campaign after he said the "Internet generation" will bring change in China. (Associated Press)
In this photo released by Saudi Press Agency, Saudi crown prince Nayef bin Abdel-Aziz, right, welcomes Chinese Premier Wen Jiabao in Riyadh, Saudi Arabia, Saturday, Jan. 14, 2012. China's premier visits Saudi Arabia as part of six-day Mideast trip that also takes him to the United Arab Emirates and qatar. The visit to the region runs from Jan. 14-19. Wen Jiabao is slated to discuss the Arab Spring uprising and talks are likely to also focus on the latest U.S. sanctions on Iran, a major oil exporter to China. (AP Photo/HO) EDITORIAL USE ONLY, NO SALES
Li Na of China returns a ball to Australia's Olivia Rogowska during their second round match at the Australian Open tennis championship, in Melbourne, Australia, Wednesday, Jan. 18, 2012. (AP Photo/Andrew Brownbill)
Chinese Premier Wen Jiabao (center) is welcomed by an unidentified Saudi official (left) as Saudi Crown Prince Nayef bin Abdel-Aziz (right) looks on before their meeting in Riyadh, Saudi Arabia, on Saturday, Jan. 14, 2012. (AP Photo/Saudi Press Agency)
IME EXPOSURE WITH LIGHT PAINTING - In this Saturday, Dec. 31, 2011 photo, Chinese use lights to draw a 2012 sign at a bund as they celebrate New Year in Shanghai, China. (AP Photo) CHINA OUT
A derailed train car is removed from a bridge as workers clear up the wreckage after a train accident in Wenzhou in east China's Zhejiang province in July. A long-awaited government report said on Wednesday design flaws and sloppy management caused the bullet-train crash. (Associated Press)
In this Monday, Oct. 17, 2011, photo, Wu Weiping, 35, watches her daughter Wang Yile, 4, right, and her son Wu Yixiao, 2, play at home in Zhuji, in eastern China's Zhejiang province. (AP Photo/Alexander F. Yuan)
In this image made from television and provided by CCTV, China's state broadcaster, a North Korean man reacts to the death of North Korean leader Kim Jong-il in Pyongyang, North Korea, on Monday, Dec. 19, 2011. (AP Photo/CCTV)
A satellite image taken on Thursday, Dec. 8, 2011, and provided by the DigitalGlobe Analysis Center shows the Chinese aircraft carrier Varyag sailing in the Yellow Sea approximately 60 miles south-southeast of the port of Dalian, China. (AP Photo/DigitalGlobe)
**FILE** Attendees at the Retreat Session of the East Asia Summit in Nusa Dua, Bali, Indonesia, on Nov. 19, 2011, include (from left) U.S. President Barack Obama, Myanmar President Thein Sein (rear), Chinese Premier Wen Jiabao, Vietnamese President Nguyen Tan Dung, Australian Prime Minister Julia Gillard and Malaysian Prime Minister Najib Razak. (Associated Press)