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Dozens of other heads of state or government, countries and international organizations also sent condolences to China over the quake.

Zhang said the local authorities should strengthen economic ties with countries and regions along the maritime trade route and boost two-way investment.

Zhang said the meeting of the China-Russia Energy Cooperation Committee is aimed to further implement the important consensus reached by the presidents of the two countries and carry out all-round, in-depth discussions on strengthening bilateral energy cooperation. He said the committee meeting will also make preparations for the October meeting between the heads of government of the two countries.

Chinese Vice Premier Zhang Gaoli and Russian President Vladimir Putin jointly witnessed the welding of the first roll of pipes on the Russian part of the China-Russia East Route natural gas pipeline in Yakutsk, the capital city of Russia's Sakha (Yakutia) Republic.

BEIJING, June 13 (Xinhua) -- Chinese Vice President Li Yuanchao met with K. Shanmugam, Singaporean minister for foreign affairs and law, here on Friday.