Russian and Chinese delegates to an economic and trade summit in Moscow agreed to strengthen ties between the two countries, officials said. Participants noted the successful trade relations have been a cornerstone of the relationship between the two countries, and joint projects in energy and transportation are making progress, the state-run Chinese Xinhua News Agency reported Wednesday. Gao Hucheng, China\'s deputy minister of commerce, called the relationship \"at a crucial transitional stage,\" emerging from expansion in scale to improvements in quality. Russian minister of economic development Andrei Belousov, urged both countries to overcome global economic turbulence to concentrate on expanding their mutual investments, a reference to slowing global growth and the Eurozone debt crisis, the news agency said.