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BEIJING, Nov. 17 (Xinhua) -- China and the United States agreed here Tuesday to further collaboration to jointly research in the health sector and in the control of diseases, especially pandemics, according to a joint statement issued after the talks between Chinese President Hu Jintao and visiting U.S. President Barack Obama.     The joint research will include that on stem cells. Both sides will deepen cooperation on global public health issues, including the prevention, surveillance, reporting and control of the A/H1N1 influenza, avian influenza, HIV/AIDS, tuberculosis, and malaria, said the statement.     The two sides will also enhance cooperation on food and product safety and quality, it added.

BEIJING, Nov. 21 (Xinhua) -- An earthquake measuring 4.3 on the Richter Scale hit a border area between northwest China's Ningxia Hui Autonomous Region and the northern Inner Mongolia Autonomous Region Saturday afternoon, according to the China Earthquake Networks Center.     The epicenter was at 38.2 degrees north latitude and 106.6 degrees east longitude.     Xinhua reporters in Yinchuan, capital of Ningxia, said tremor was felt in the downtown area.     No casualties have been reported.

BEIJING, Dec. 27 (Xinhua) -- China would not yield to pressure for the appreciation of its currency yuan, or renminbi, in any form, Chinese Premier Wen Jiabao said Sunday.     "A stable Chinese currency is conducive to the international community," Wen told Xinhua in an exclusive interview.

SHANGHAI, Nov. 16 (Xinhua) -- Visiting U.S. President Barack Obama said here Monday that Shanghai and Chicago can learn from each other especially on clean energy.     He made the remarks during a dialogue with Chinese students at the Shanghai Science and Technology Museum. It is his first trip to China since taking office in January.     "It's a terrific opportunity for us to learn from each other," he said.     "In the United States we are learning how to develop buildings that use much less energy and that are much more energy-efficient. I noticed in Shanghai many new buildings are growing up. It's important to incorporate these new technologies so that each building is energy-efficient when it comes to lighting, when it comes to heating," he said.     Clean energy issue is going to be a major focus in the 2010 Shanghai World Expo, he said.     Shanghai and Chicago have been sister cities since 1985.

BEIJING, Oct. 31 (Xinhua) -- Chinese Premier Wen Jiabao on Saturday called for tightened prevention measures against A/H1N1 influenza as the country recorded an increasing number of people catching seasonal influenza upon the arrival of winter.     In a visit to a children's hospital in the Chinese capital, Wen said the country faces severe challenges in the prevention and control of A/H1N1 and some areas are likely to have a sharp increase in the number of patients infected by the epidemic.     He said the country is fully confident and capable of doing well the prevention and control work of the A/H1N1 flu and would spare no effort in helping patients, especially those with severe symptoms, to recover. Chinese Premier Wen Jiabao (R2) talks with patients at the Beijing Children's Hospital in Beijing, capital of China, Oct. 31, 2009. Premier Wen visited A/H1N1 patients and medical staff at the Beijing Children's Hospital in Beijing on Saturday    Doctors would reassure patients that A/H1N1 flu can be prevented, controlled, and cured, he said.     Wen required intensified efforts to spread the knowledge concerning prevention and control of A/H1N1 flu and asked medical authorities to beef up prevention measures in schools and urban communities.     He also urged to mobilize residents to inoculate A/H1N1 flu vaccines on a volunteer basis and called on vaccine producers to speed up their production.     Medical staff should be careful and avoid infection when treating patients, he said.