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SHANGHAI, Dec. 9 (Xinhua) -- China's homegrown C919 large passenger plane has finished its preliminary development review and entered the development phase, a senior executive of Commercial Aircraft Corporation of China Ltd. (COMAC) in Shanghai said Friday.An expert team of the C919 project has approved the overall preliminary development review (PDR) of the passenger jet, said Jin Zhuanglong, president of the Shanghai-based COMAC.It is expected that the manufacturing process for the components of the prototype will begin by the end of 2011.COMAC signed a deal to sell 20 C919 large passenger planes to China Aircraft Leasing Company Limited (CALC) on Thursday.Up to now, the users of C919 large passenger planes have reached 10 and total orders amount to 215 units.COMAC said earlier it would develop both 168-seat and 156-seat models of the jet, with more models to be developed in the future.It also said that test flights for the single-aisle C919 were scheduled for 2014, and delivery is slated for 2016.

BEIJING, Jan. 4 (Xinhua) -- Senior Chinese leader Li Changchun on Wednesday called for more efforts to strengthen the Internet construction and management and promote a healthy online culture.Li, a member of the Standing Committee of the Political Bureau of the Communist Party of China Central Committee, made the remarks at a national conference of publicity officials.Li also urged the officials to work and fortify the leading status of Marxism in the country's ideological field, and to provide spiritual support for the economic and social development.Li Changchun (C), a member of the Standing Committee of the Political Bureau of the Communist Party of China Central Committee, addresses a national conference of publicity officials in Beijing, capital of China, Jan. 4, 2012.The publicity work should help create a favorable environment for the country's efforts to stabilize economic growth, regulate commodity prices, adjust the economic structure, improve people's livelihood, carry forward reform and promote social harmony, Li said.Moreover, Li called for efforts to deepen the reform and promote development in the country's cultural sector.

BEIJING, Oct. 20 (Xinhuanet) -- A Teenager's intelligence is not fixed as usually thought. Instead, it can go through swings in a few years, according to a British study reported online in Nature.Teenagers' IQ can rise or fall 20 points over time, researchers from Wellcome Trust Centre for Neuroimaging of Kings College, showed in their study.IQ (short for "intelligent quotient") is an gauge of mental capability measured through a series of standardized tests of language skill, spatial ability, arithmetic, memory and reasoning.To get the findings, Cathy Price, senior researcher of the study, and her colleagues tested 33 British teenagers between the ages of 12 to 16 in 2004, who had average IQ scores around 100. Then the teenagers were retested four years later.The researchers found the volunteers' IQ scores went up and down over the four years, with some teenager's scores rising by as many as 20 points, and others' dropping by the same points."That is quite astounding," cheered psychologist Robert Plomin from the same university but not involved in the study. Dr. Price and her colleagues don't know the causes of such fluctuations in the scores they tested, but speculate that learning experiences might account the changes, reported by the Wall Street Journal Today. "We have to be careful not to write off poorer performers at an early stage when in fact their IQ may improve significantly given a few more years," stated Dr. Price cited by the Huffington Post.

SAN FRANCISCO, Oct. 5 (Xinhua) -- Google announced Wednesday that Google Earth, the tech giant's virtual globe, map and geographical information program, has been downloaded more than one billion times since it was first introduced in 2005.According to Google's official blog, there have been more than one billion downloads of the Google Earth desktop client, mobile apps and the Google Earth plug-in. To celebrate the milestone, Google is aggregating all the interesting ways people have used Google Earth around the world and posting them on "www. OneWorldManyStories.com.""We never imagined our geospatial technology would be used by people in so many unexpected ways," said Google in the blog post.Google Earth maps the Earth by images obtained from satellite imagery, aerial photography and GIS (geographic information system) 3D globe. It also has versions of Moon, Mars and Sky, enabling users to see images and videos of the planets and distant galaxies.It is currently available in Google Earth, a free version with limited function, as well as Google Earth Pro and Google Earth Enterprise, subscription services with additional features intended for commercial use.

BEIJING, Jan. 1 (Xinhua) -- President Hu Jintao, along with other Chinese leaders, celebrated the New Year with political advisors Sunday morning in Beijing and delivered an important speech.Hu and the other members of the Standing Committee of the Political Bureau of the Communist Party of China (CPC) Central Committee Wu Bangguo, Wen Jiabao, Jia Qinglin, Li Changchun, Xi Jinping, Li Keqiang, He Guoqiang and Zhou Yongkang attended a tea party held by the National Committee of the Chinese People's Political Consultative Conference (CPPCC).The party was presided over by Jia Qinglin, chairman of the CPPCC National Committee.The leaders were joined by senior members of the central committees of non-Communist parties and the All-China Federation of Industry and Commerce, personages without party affiliation, officials of the central government and representatives from all walks of life and all ethnic groups in Beijing.