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China overtook the United States as the world's largest electric car market in 2015 and has held the title since then. "The idea of Europe surpassing China this year makes me sad," Zeng said.

China overtook the United States to become the world's largest corporate travel market in 2016 with its size reaching 146.5 billion yuan. Food processing, public utilities and construction were the top three industries with the biggest budgets for business travel.

China overtook the United States in 2015 and has since been the largest market for such vehicles.

China on Thursday expressed concerns over the "glass door" or "swing door" restrictions on Chinese investment by the United States citing national security concerns.

China unveiled a wide-ranging guideline to phase out nondegradable plastic products in major consuming sectors on Sunday, vowing to effectively curb plastic pollution in major cities in five years.