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Linkedin, the world's largest business-oriented social network with more than 300 million users, has been used by many global Chinese enterprises, including Baidu and Tencent, to search for talents, said its founder Reid Hoffman in a speech at the conference on Wednesday. The company launched its Chinese language version in February.

The 50.8-billion-pesos (about 3.7 billion U.S. dollars) project involves building a bullet train line to connect the national capital of Mexico City with the growing industrial hub of Queretaro to the north by 2017. Upon completion, the bullet train service would cut travel time from about two and a half hours to less than an hour, with trains traveling at a maximum speed of 300 kilometers per hour.

The high speed led to hefty friction between the orbiter and air and high temperatures on the craft's exterior, generating an ion sheath that cut off contact between ground command and the orbiter.

To help it slow down, the craft is designed to "bounce" off the edge of the atmosphere, before re-entering again. The process has been compared to a stone skipping across water, and can shorten the "braking distance" for the orbiter, according to Zhou Jianliang, chief engineer with the Beijing Aerospace Command and Control Center.