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China's economy grew at its slowest pace in almost three years in the first quarter, with its gross domestic product expanding only 8.1 percent during the period.

The State Administration of Work Safety said in a statement on its website that it will work with the Ministry of Railways to have a safety overhaul.

During the expedition, Xuelong delivered supplies to the country's Antarctic stations, and scientists aboard conducted various scientific research tasks, including polar environmental survey and the installation of an Antarctica survey telescope.

Li has promised further efforts to promote information transparency among China's charity sector.

"Patent protection has brought great profits to companies and accelerated their scientific and technological innovation. But vital information, such as the prescription and the ingredient list, has to be released at the same time," said Xia.