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ABOARD ZHENGZHOU, May 22 (Xinhua) -- Chinese and Russian navies on Thursday completed a defense exercise against the intrusion of unidentified boats as part of their ongoing naval drill "Joint Sea-2014".

Baucus said that U.S.-China relationship is one of the most important bilateral ties in the world, noting that there is no change in the U.S. policy towards China. The U.S. will continue to work with China to build a new type of relationships between major countries.

Two documents, the China and Russia Purchase and Sales Contract on East Route Gas Project and a memorandum, were signed at a ceremony attended by Chinese President Xi Jinping and Putin.

The Chinese president proposed to put in place a non-governmental exchange network for CICA parties through holding CICA non-governmental forums and other means, to increase the conference's influence and promote regional security governance.

A disastrous bullet train crash in July 2011 brought an atmosphere of unprecedented caution to rail construction in China. Since then, it has become clear that the speedy development of the sector will fuel economic expansion, while benefiting the people by making it quicker and easier to get about.