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"Due to the influence of cold air from the west, atmospheric conditions to diffuse pollution in northern parts, including the Beijing-Tianjin-Hebei province cluster and the Fenhe-Weihe Plain region, will not worsen and will stay the same as the past five-year average," Jia Xiaolong, deputy head of the center, told a news conference on Wednesday.

"Egyptian companies like Orascom and Arab Contractors may be more efficient than us in low-rise and mid-rise, but high-rise is our speciality," he added.

"Dabry's sturgeon, a class A protected fish in China that is also called the Yangtze sturgeon, had lost its natural ability to breed since 2000 due to dam constructions, overfishing and river traffic, thus the wild species was near extinction," said Yu Kangzhen, Vice Minister of Agriculture and Rural Affairs.

"Expanding imports is an important way to achieve mutual benefit," said Li, noting that China's huge market potential would enable other countries to achieve common development and prosperity.

"Everyone is working towards what will be a fantastic Tokyo games. In the unlikely event that it is required, London, as it has done throughout history, will do its best to step up to the plate."