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CHICAGO, Jan. 21 (Xinhua) -- Chinese President Hu Jintao left Chicago for home on Friday after concluding a four-day state visit to the United States, during which Hu and his U.S. counterpart Barack Obama agreed to build a China-U.S. cooperative partnership based on mutual respect and mutual benefit.President Hu, who began his visit on Tuesday, had extensive and in-depth discussions with Obama at the White House on Wednesday on major bilateral, regional and world issues.The two sides reached "important agreement on China-U.S. relations and major international and regional issues of shared interest," the Chinese president said when he and Obama met the press following their discussions."We both agree to further push forward the positive, cooperative and comprehensive China-U.S. relationship," Hu said, adding that both sides also pledged to forge "a China-U.S. cooperative partnership based on mutual respect and mutual benefit" for the benefit of the two countries and beyond.The Chinese president said he and Obama also discussed some disagreements in the economic and trade area, with both sides pledging "to continue to appropriately resolve these according to the principle of mutual respect and consultation on an equal footing."Also on Wednesday, Hu attended a state dinner and a welcome ceremony hosted by Obama.Hu told the Americans on several occasions in Washington that the purpose of his visit to the United States was "to increase mutual trust, enhance friendship, deepen cooperation and advance the positive, cooperative and comprehensive China-U.S. relationship for the 21st century."During Hu's visit, the two countries issued the "China-U.S. Joint Statement," which says "China and the United States committed to work together to build a cooperative partnership based on mutual respect and mutual benefit in order to promote the common interests of both countries and to address the 21st century's opportunities and challenges.""China and the United States are actively cooperating on a wide range of security, economic, social, energy, and environmental issues which require deeper bilateral engagement and coordination," the statement said.On Thursday, Hu called upon the U.S. Congress to continue helping the two countries boost their relations.Pursuing a healthy and steady development of China-U.S. ties is China's established policy and strategic choice, Hu stressed when meeting House Speaker John Boehner and Senate Majority Leader Harry Reid.Also on Thursday in Washington, Hu delivered an important speech at the welcome luncheon hosted by friendly organizations in the United States.To advance the sustained, sound and steady development of China-U.S. relations serves the fundamental interests of peoples of China and the United States, he said.

ISTANBUL, May 3 (Xinhua) -- The world's water consumption will increase by 40 percent over the next two decades and efforts to meet this demand must increase radically, the secretary-general of the 5th World Water Forum said here on Tuesday.Oktay Tabasaran said in his opening speech at the World Water Forum that "water consumption will increase by 40 percent in the coming 20 years, reaching 6.9 trillion cubic meters per year ( compared with the 4.5 trillion used currently), and an amount of 200 billion U.S. dollars must be spent annually in order to afford this."He said such figures indicated the urgent need for countries to engage in efficient cooperation with each other to address water- related issues.Some 50 out of the world's 188 countries have serious concerns in providing drinking and irrigation water, due to careless and inefficient use of water, according to Ismail Ugur, the general director of Turkey's State Waterworks Authority."If we fail to come up with solutions, starting from 2015 there will be droughts (in many parts of the world) and people will start suffering from diseases caused by lack of water, as of 2025, " Ugur said.Ekmeleddin Ihsanoglu, head of the Organization of the Islamic Conference (OIC), said that ensuring reliable access to water is crucial to promoting peace and security in the Middle East, where many countries are facing dramatic declines in available water."In some regions of the Muslim world, water availability is predicted to be cut in half by 2050, even without taking into consideration the effects of climate change," he said in his opening speech.The OIC chief called for increased cooperation among member states and countries outside the region, announcing the group's progress in preparing its own "Water Vision" document and forming an OIC Water Council to address water-related concerns."In its first phase, the Water Vision will outline a framework of cooperation on water-related issues in terms of water-sharing experience, capacity development, technology transfer, water governance and institutional reforms," Ihsanoglu said.He cited the Friendship Dam, to be constructed on the Orontes River at the Turkish-Syrian border, as an excellent example of cooperation and peace among neighboring countries in the field of water.Charity Ngilu, minister for water and irrigation of Kenya, stressed the importance of water in promoting peace, especially in regions where water scarcity prevails."There have been many conflicts caused by water scarcity not only among African countries, but even within regions of the same country," She said, adding Kenya would ask Turkey for cooperation and assistance in water management and other related issues.

WELLINGTON, May 24 (Xinhua) -- New Zealand researchers have found a way to stop the growth of certain cancer tumors by " silencing" a group of PAX genes, members of a small family of genes that play important roles in embryonic development, but also allow cancer cells to grow and divide in adult tissue.In an article published in UK medical journal Oncogene, Otago University Professor Michael Eccles and colleagues revealed how they used the PAX8 gene to kill cancer cells.After detecting high levels of PAX8 protein in the majority of kidney, ovarian and thyroid cancers they studied, the researchers used molecular techniques to silence the PAX8 gene in several cancer cell lines."We found that these PAX8-depleted cancer cells ceased growing and dividing. The cells were essentially stopped in their tracks through the failure of multiple mechanisms and pathways crucial to their cell division cycle. They then entered into a state called senescence in which they no longer divided, and after that they ultimately died," Eccles said in a statement from the university Tuesday.The findings suggested that PAX8 could be a good target for the development of new cancer therapies, he said."Any resulting drugs would be a long way down the road, but in the meantime this research helps confirm that a focus on PAX genes may prove to be a fruitful line of attack against a number of cancers," he said.The research was supported by grants from the Health Research Council of New Zealand. It formed the main piece of work carried out by Otago doctoral graduate Caiyun (Grace) Li, now a postdoctoral fellow at Stanford University. Study co-authors also included Professor Antony Braithwaite and master's student Jen Nyman.In 2003, research led by Eccles discovered that proteins from one or more of the nine PAX genes were present in many common cancers. They found that "silencing" the gene expression of PAX2 in ovarian and bladder cancer cells, and of PAX3 in melanoma, led to the rapid death of the cells.

BEIJING, Feb. 8 (Xinhua) -- As the Chinese Lunar New Year hoilday ended Tuesday, waves of Chinese residents began their journey back to work, as they boarded trains, airplanes and buses.The China Meteorological Administration announced Tuesday that a cold front would cause temperatures to fall by 4 to 12 degrees Celsius in most parts of the country, while some areas in the northwest, north and southwest will see rainfall or snow from Wednesday to Friday.Fleets of motorbikes carrying thousands of migrant workers passed through national roads again on Tuesday.The Ministry of Public Security said it set up 8,300 service stations along the country's major highways to provide free food, medicine, and rest stops for motor-riding migrant workers. The stations also sent police cars to clear the way for large groups of motorists.Chen Tianchong, a migrant worker from Muge County, Guigang City of southwest China' s Guangxi Zhuang Autonomous Region and 38 of his fellow migrant worker started their journey on motorcycles at 4:30 a.m. on the foggy National Road 324, which is a 2,712-kilometer road linking five provinces of Fujian, Guangdong, Guangxi, Guizhou and Yunan in southern China.A motorcycle usually carried two people, often a couple, sometimes with a child sandwiched in between. They would wrap themselves in thick outerwear to battle the cold weather at night. Limited access to cheap public transportation had forced many migrant workers to make their trips home on their own."I promised my boss that I would go back to the factory in Guangdong before Wednesday," said Chen.Chen said that they might arrive at Dali County, Shunde City of south China's Guangdong Province around eleven at night, after more than 18 hours riding a motorcycle from their hometown. By this way, each family may save more than 1,000 yuan - half of their monthly income.Zhong Fei, another migrant worker also from Guangxi, chose this way home during the Spring Festival for the past three years. Zhong told Xinhua that earning money for his family was the most important thing and the exhausting trip was nothing.From Guangdong alone, one of China's manufacturing bases, over 100,000 migrant workers left for home on motorbikes, said the local police. The Spring Festival travel rush started in China in the late 1980s, when millions of farmers from inland China moved to coastal cities to work.In spite the increasing popularity of motor cycles, the majority of Chinese travelers still prefer trains or buses. Shandong province embraced the post-holiday passenger rush Tuesday, with railway stations witnessing 200,000 passengers in a single day.Highway toll booths near Beijing, Shanghai, Tianjin and other big cities in China have become clogged.Passengers are also snapping up airplane tickets. China Southern Airlines had increased flights from 30 to 70 flights per day.Official forecasts indicate that this year's Spring Festival holiday may see a record 2.85 billion passenger trips nationwide, as Chinese workers return home from across the country for family reunions and go back to work after the holidays.