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The open-pit mining site stretched for 5 km, forming a ravine about one km wide and 300 to 500 meters deep. The excavated underground frozen soil, rock and coal gangue was piled up 40 to 50 meters high near the mine, burying large areas of grassland.

The leaders also exchanged views on international and regional issues including the Afghanistan and the Iranian nuclear issues, agreeing to strengthen communication and coordination and to make joint efforts in maintaining international and regional security and stability.

China's loan prime rate reform should be further deepened to guide the lending rates lower, and more measures shall be taken to facilitate the financing of small and micro businesses, it said.

Li pointed out that in the face of the epidemic, China has always put people's lives and health first. With the most comprehensive, rigorous, and thorough prevention and control measures, China has achieved major strategic progress against the virus.

"We strongly urge U.S. politicians to abide by international law and the basic norms governing international relations, mind their own business, and immediately stop interfering in Hong Kong affairs and China's internal affairs as a whole," the spokesperson said.