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China, Iran, Panama and Hong Kong signed an agreement on Thursday to investigate the sinking of an oil tanker in the East China Sea, the Ministry of Transport said.

China's pharmaceutical market has been constantly growing in recent years, and is estimated to reach 1.8 billion by 2023, taking a 30 percent share of the global market, said an industry expert.

Chinese Foreign Ministry spokesperson Hua Chunying said at a daily press briefing that the deal embodies the broadest consensus of the international community on coping with climate change.

China's working-age population is forecast to fall from the peak of 41 percent of the total population in 2011 to as low as 23 percent by 2020, a direct result of the country's aging population, according to Huang.

Chinese Premier Li Keqiang (R), who is also a member of the Standing Committee of the Political Bureau of the Communist Party of China (CPC) Central Committee, meets with Laotian President Bounnhang Vorachit, also general secretary of the Lao People's Revolutionary Party (LPRP) Central Committee, in Beijing, capital of China, May 31, 2018. [Photo/Xinhua]