In the meantime, policymakers are making clear that economic growth remains a top priority — and that growth depends largely on coal power. Beijing has a GDP target of 6% this year, a level which analysts say would allow authorities to tackle long-term problems such as the country's high debt levels. "China's energy structure is dominated by coal power. This is an objective reality," said Su Wei, deputy secretary-general of the National Development and Reform Commission. CNBC translated his Mandarin-language comments, which he made late last week following Xi's separate remarks at a U.S.-led global leaders climate summit. "Because renewable energy (sources such as) wind and solar power are intermittent and unstable, we must rely on a stable power source," Su said. "We have no other choice. For a period of time, we may need to use coal power as a point of flexible adjustment."