China's Yu Xiaoyang falls down while performing with Wang Chen at the ice dance short dance segment during the ISU Grand Prix of Figure Skating in Beijing, November 1, 2013. REUTERS/Kim Kyung-Hoon (CHINA - Tags: SPORT FIGURE SKATING)

China's Yu Xiaoyang and Wang Chen perform at the ice dance short dance segment during the ISU Grand Prix of Figure Skating in Beijing, November 1, 2013. REUTERS/Kim Kyung-Hoon (CHINA - Tags: SPORT FIGURE SKATING)

Yu Xiaoyang (R) and Wang Chen of China perform during the ice dance free dance at the ISU World Team Trophy in Figure Skating in Tokyo April 12, 2013. REUTERS/Yuya Shino (JAPAN - Tags: SPORT FIGURE SKATING)

Xiaoyang Yu (female) and Chen Wang of China perform during the ice dance free dance at the ISU World Team Trophy in Figure Skating in Tokyo April 12, 2013. REUTERS/Toru Hanai (JAPAN - Tags: SPORT FIGURE SKATING)

Xiaoyang Yu (female) and Chen Wang of China perform during the ice dance free dance at the ISU World Team Trophy in Figure Skating in Tokyo April 12, 2013. REUTERS/Toru Hanai (JAPAN - Tags: SPORT FIGURE SKATING)

Xiaoyang Yu (top) and Chen Wang of China perform during the ice dance short dance at the ISU World Team Trophy in Figure Skating in Tokyo April 11, 2013. REUTERS/Yuya Shino (JAPAN - Tags: SPORT FIGURE SKATING)

Xiaoyang Yu (L) and Chen Wang of China perform during the ice dance short dance at the ISU World Team Trophy in Figure Skating in Tokyo April 11, 2013. REUTERS/Toru Hanai (JAPAN - Tags: SPORT FIGURE SKATING)

Yu Xiaoyang and Wang Chen of China perform during the Ice Dance Free Dance programme at ISU Grand Prix of Figure Skating's NHK Trophy event in Sendai, northern Japan, November 24, 2012. REUTERS/Kim Kyung-Hoon (JAPAN - Tags: SPORT FIGURE SKATING)

Yu Xiaoyang and Wang Chen of China perform during the ice dance short dance segment at ISU Grand Prix of Figure Skating's NHK Trophy event in Sendai, northern Japan November 23, 2012. REUTERS/Kim Kyung-Hoon (JAPAN - Tags: SPORT FIGURE SKATING)

Yu Xiaoyang and Wang Chen of China perform during the ice dance short dance segment at ISU Grand Prix of Figure Skating's NHK Trophy event in Sendai, northern Japan November 23, 2012. REUTERS/Kim Kyung-Hoon (JAPAN - Tags: SPORT FIGURE SKATING)

Yu Xiaoyang and Wang Chen of China compete during the free dance program at the Cup of China ISU Grand Prix of Figure Skating in Shanghai November 5, 2011. REUTERS/Carlos Barria (CHINA - Tags: SPORT FIGURE SKATING)

Yu Xiaoyang and Wang Chen of China perform during the ice dance short dance program competition at the ISU Four Continents Figure Skating Championships in Taipei February 17, 2011. REUTERS/Nicky Loh (TAIWAN - Tags: SPORT FIGURE SKATING IMAGES OF THE DAY)

China's Huang Xintong and Zheng Xun (C), Japan's Cathy Reed and Chris Reed (L) and China's Yu Xiaoyang and Wang Chen attend the medal ceremony after ice dance and free dance skating at the 7th Asian Winter Games competition in Astana February 5, 2011. REUTERS/Grigory Dukor (KAZAKHSTAN - Tags: SPORT FIGURE SKATING)

China's Huang Xintong and Zheng Xun (C), Japan's Cathy Reed and Chris Reed (L) and China's Yu Xiaoyang and Wang Chen attend the medal ceremony after ice dance and free dance skating at the 7th Asian Winter Games in Astana February 5, 2011. REUTERS/Grigory Dukor (KAZAKHSTAN - Tags: SPORT FIGURE SKATING)

China's Yu Xiaoyang and Wang Chen perform during their ice dance free dance segment at the 7th Asian Winter Games competition in Astana February 5, 2011. REUTERS/Grigory Dukor (KAZAKHSTAN - Tags: SPORT FIGURE SKATING)

China's Yu Xiaoyang and Wang Chen perform their ice dance free dance segment at the 7th Asian Winter Games competition in Astana February 5, 2011. REUTERS/Grigory Dukor (KAZAKHSTAN - Tags: SPORT FIGURE SKATING)

China's Yu Xiaoyang and Wang Chen perform their ice dance free dance segment at the 7th Asian Winter Games competition in Astana February 5, 2011. REUTERS/Grigory Dukor (KAZAKHSTAN - Tags: SPORT FIGURE SKATING)

China's Yu Xiaoyang and Wang Chen perform their ice dance free dance segment at the 7th Asian Winter Games competition in Astana February 5, 2011. REUTERS/Grigory Dukor (KAZAKHSTAN - Tags: SPORT FIGURE SKATING)

Yu Xiaoyang and Wang Chen of China perform during the ice dance short dance figure skating competition at the 7th Asian Winter Games in Astana February 3, 2011. REUTERS/Grigory Dukor (KAZAKHSTAN - Tags: SPORT FIGURE SKATING)

Yu Xiaoyang and Wang Chen of China perform during the ice dance short dance figure skating competition at the 7th Asian Winter Games in Astana February 3, 2011. REUTERS/Grigory Dukor (KAZAKHSTAN - Tags: SPORT FIGURE SKATING)

Yu Xiaoyang (L) and Wang Chen of China react after performing at the ice dance free dance event at the World Figure Skating Championships in Turin March 26, 2010. REUTERS/Max Rossi (ITALY - Tags: SPORT FIGURE SKATING)

Yu Xiaoyang (L) and Wang Chen of China perform during the ice dance free dance event at the World Figure Skating Championships in Turin March 26, 2010. REUTERS/Max Rossi (ITALY - Tags: SPORT FIGURE SKATING)

Yu Xiaoyang (L) and Wang Chen of China perform during the ice dance free dance event at the World Figure Skating Championships in Turin March 26, 2010. REUTERS/Giampiero Sposito (ITALY - Tags: SPORT FIGURE SKATING)

Yu Xiaoyang (L) and Wang Chen of China perform during the ice dance free dance event at the the World Figure Skating Championships in Turin March 26, 2010. REUTERS/Giampiero Sposito (ITALY - Tags: SPORT FIGURE SKATING)

Yu Xiaoyang (front) and Wang Chen of China perform during the original dance segment of the ice dance competition at the World Figure Skating Championships in Turin March 25, 2010. REUTERS/Max Rossi (ITALY - Tags: SPORT FIGURE SKATING)

Yu Xiaoyang (R) and Wang Chen of China perform during the original dance segment of the ice dance competition at the World Figure Skating Championships in Turin March 25, 2010. REUTERS/Max Rossi (ITALY - Tags: SPORT FIGURE SKATING)

Yu Xiaoyang (R) and Wang Chen of China react after their ice dance compulsory dance performance at the World Figure Skating Championships in Turin March 23, 2010. REUTERS/Giampiero Sposito (ITALY)

Yu Xiaoyang (L) and Wang Chen of China perform during the ice dance compulsory dance event at the World Figure Skating Championships in Turin March 23, 2010. REUTERS/Max Rossi (ITALY)

Yu Xiaoyang (front) and Wang Chen of China perform during the ice dance compulsory dance event at the World Figure Skating Championships in Turin March 23, 2010. REUTERS/Max Rossi (ITALY)

Yu Xiaoyang (L) and Wang Chen of China perform during the ice dance compulsory dance event at the World Figure Skating Championships in Turin March 23, 2010. REUTERS/Max Rossi (ITALY)

Yu Xiaoyang (L) and Wang Chen of China perform during the ice dance compulsory dance event at the World Figure Skating Championships in Turin March 23, 2010. REUTERS/Max Rossi (ITALY)

China's Yu Xiaoyang Yu (L) and Wang Chen practise for the Ice Dance competition at the World Figure Skating Championships in Turin March 22, 2010. REUTERS/Max Rossi (ITALY - Tags: SPORT FIGURE SKATING)

Yu Xiaoyang (front) and Wang Chen of China practice for the Ice Dance competition at the World Figure Skating Championships in Turin March 21, 2010. REUTERS/Max Rossi (ITALY)

Yu Xiaoyang (front) and Wang Chen of China practice for the Ice Dance competition at the World Figure Skating Championships in Turin March 21, 2010. REUTERS/Max Rossi (ITALY)

Yu Xiaoyang (L) and Wang Chen of China practice for the Ice Dance competition at the World Figure Skating Championships in Turin March 21, 2010. REUTERS/Max Rossi (ITALY)

Yu Xiaoyang (L) and Wang Chen of China perform during the Ice Dance Free Dance competition at the ISU Four Continents Figure Skating Championships in Jeonju, about 240 km (149 miles) south of Seoul, January 29, 2010. REUTERS/Jo Yong-Hak (SOUTH KOREA - Tags: SPORT FIGURE SKATING)

Yu Xiaoyang (front) and Wang Chen of China perform during the Ice Dance Original Dance competition at the ISU Four Continents Figure Skating Championships in Jeonju, about 240 km (149 miles) south of Seoul, January 28, 2010. REUTERS/Jo Yong-Hak (SOUTH KOREA - Tags: SPORT FIGURE SKATING)

Yu Xiaoyang (L) and Wang Chen of China perform during the Ice Dance Original Dance competition at the ISU Four Continents Figure Skating Championships in Jeonju, about 240 km (149 miles) south of Seoul, January 28, 2010. REUTERS/Jo Yong-Hak (SOUTH KOREA - Tags: SPORT FIGURE SKATING)

Yu Xiaoyang (L) and Wang Chen of China perform during the Ice Dance Compulsory Dance competition at the ISU Four Continents Figure Skating Championships in Jeonju, about 240 km (149 miles) south of Seoul, January 27, 2010. REUTERS/Jo Yong-Hak (SOUTH KOREA - Tags: SPORT FIGURE SKATING)

Yu Xiaoyang and Wang Chen of China perform during the Ice Dance Original Dance competition at Skate America in Lake Placid, New York, November 14, 2009. REUTERS/Christinne Muschi (UNITED STATES SPORT FIGURE SKATING)

Yu Xiaoyang and Wang Chen of China perform during the Ice Dance Compulsory Dance competition at Skate America in Lake Placid, New York, November 13, 2009. REUTERS/Christinne Muschi (UNITED STATES SPORT FIGURE SKATING)

Yu Xiaoyang and Wang Chen of China perform during the Ice Dance Compulsory Dance competition at Skate America in Lake Placid, New York, November 13, 2009. REUTERS/Christinne Muschi (UNITED STATES SPORT FIGURE SKATING)

Yu Xiaoyang and Wang Chen of China compete during the Ice Dance Compulsory Dance competition at Skate America in Lake Placid, New York, November 13, 2009. REUTERS/Christinne Muschi (UNITED STATES SPORT FIGURE SKATING)

China's Xiaoyang Yu and Chen Wang compete in the Ice Dance Free Dance during the ISU Four Continents Figure Skating Championships in Vancouver, British Columbia February 6, 2009. REUTERS/Andy Clark (CANADA)

China's Yu Xiaoyang and Wang Chen compete in the Ice Dance Original Dance during the ISU Four Continents Figure Skating Championships in Vancouver, British Columbia February 5, 2009. REUTERS/Andy Clark (CANADA)

China's Wang Chen and Yu Xiaoyang (L) compete in the Ice Dancing Compulsory during the ISU Four Continents Figure Skating Championships in Vancouver, British Columbia February 4, 2009. REUTERS/Andy Clark (CANADA)

China's Wang Chen and Yu Xiaoyang (R) compete in the Ice Dancing Compulsory during the ISU Four Continents Figure Skating Championships in Vancouver, British Columbia February 4, 2009. REUTERS/Andy Clark (CANADA)

China's Yu Xiaoyang and Wang Chen perform during the ice dancing original dance programme at the World Figure Skating Championships in Gothenburg March 20, 2008. REUTERS/Bob Strong (SWEDEN)

China's Yu Xiaoyang and Wang Chen perform during the ice dancing original dance programme at the World Figure Skating Championships in Gothenburg March 20, 2008. REUTERS/Grigory Dukor (SWEDEN)

China's Yu Xiaoyang and Wang Chen perform during the ice dancing original dance programme at the World Figure Skating Championships in Gothenburg March 20, 2008. REUTERS/Grigory Dukor (SWEDEN)

China's Yu Xiaoyang and Wang Chen perform during the ice dancing compulsory dance programme at the World Figure Skating Championships in Gothenburg March 18, 2008. REUTERS/Grigory Dukor (SWEDEN)

China's Yu Xiaoyang and Wang Chen perform during the ice dancing compulsory dance programme at the World Figure Skating Championships in Gothenburg March 18, 2008. REUTERS/Bob Strong (SWEDEN)

China's Yu Xiaoyang and Wang Chen perform during the ice dancing compulsory dance programme at the World Figure Skating Championships in Gothenburg March 18, 2008. REUTERS/Grigory Dukor (SWEDEN)

Security guards remove lawmaker and pro-democracy activist Leung Kwok-hung before a forum addressed by Hong Kong Chief Executive Donald Tsang and Deputy Secretary General of the Standing Comittee of the National People's Congress (NPCSC) Qiao Xiaoyang at the Government House in Hong Kong December 29, 2007. REUTERS/Victor Fraile (CHINA)

Director of the Liaison Office of the Central People's Government Gao Siren (L), Hong Kong Chief Executive Donald Tsang (C) and Deputy Secretary General of the Standing Comittee of the National People's Congress (NPCSC) Qiao Xiaoyang attend a forum at the Government House in Hong Kong December 29, 2007. China ruled out full democracy for Hong Kong in 2012 on Saturday, ignoring the majority opinion in the former British colony, but said it may pick its leader by universal suffrage at the following opportunity, in 2017. REUTERS/Victor Fraile (CHINA)

Hong Kong Chief Executive Donald Tsang (L) and Deputy Secretary General of the Standing Comittee of the National People's Congress (NPCSC) Qiao Xiaoyang attend a forum at the Government House in Hong Kong December 29, 2007. China ruled out full democracy for Hong Kong in 2012 on Saturday, ignoring the majority opinion in the former British colony, but said it may pick its leader by universal suffrage at the following opportunity, in 2017. REUTERS/Victor Fraile (CHINA)

China's skaters Xiaoyang Yu and Chen Wang perform their Ice Dancing Free Dance during the Bompard Trophy event at Bercy in Paris, November 17, 2007. REUTERS/Gonzalo Fuentes (FRANCE)

China's skaters Xiaoyang Yu and Chen Wang perform their Ice Dancing Free Dance during the Bompard Trophy event at Bercy in Paris, November 17, 2007. REUTERS/Gonzalo Fuentes (FRANCE)

China's skaters Yu Xiaoyang and Wang Chen perform their Ice Dancing Free Dance during the Bompard Trophy event at Bercy in Paris, November 17, 2007. REUTERS/Gonzalo Fuentes (FRANCE)

China's skaters Xiaoyang Yu and Chen Wang perform during the Ice Dancing Compulsory Dance at the Bompard Trophy event in Bercy, November 16, 2007. REUTERS/Gonzalo Fuentes (FRANCE)