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Caution tape is seen near a giant sinkhole caused by a burst water main in Los Angeles on Dec 22. MARK RALSTON/AGENCE FRANCE-PRESSE

Chao said Sina's edge is its detailed knowledge of users. Weibo is commonly used to post everything from videos to text messages and 313 million people access it at least once a month－on par with Twitter. Once combined with information from other sources, that data could be used to better evaluate loan risks.

Chan said patent protection could be a driver for price increases, but better health insurance policies and more awareness of corporate social responsibility can help ease the pressure on those who cannot afford medicine.

Cheered on by 7,000 spectators, Xi and Putin dropped the puck for the game after exchanging team uniforms and posing for photos with the players. They watched the full first period of the game before leaving for a welcoming banquet. The game was tied 4-4.

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