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Chang Yunbo, vice-president of the China Communications Construction Company Ltd (CCCC) South America, called on Brazilian businesses to plan for long-term bilateral cooperation as their Chinese partners do, and to deal in the Brazilian and Chinese currencies instead of the US dollar, which he believes increases operational costs.

Changing agricultural practices, switching sources of electricity generation and accelerating the conversion of home-heating fuel from charcoal to natural gas are also key measures in the pollution fight, Cass said.

Chan is confident that Pratic's products can help customers, operators and manufacturers in the North American market be competitive, reduce costs, improve efficiency and increase output.

Cao Yuanmeng, an official with the National Development and Reform Commission, said the country's northeast is going through the key phase of revitalization, and NDRC will fully use the platform provided through the expo to maximize the advantage of its coastal and border location to push the progress of opening-up the country's economy.

Changes in market expectations and uncertainties over the future economic environment also influenced the behavior of investors, who are very concerned about issues such as the development of the private economy and property rights protection.