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China began its research on combustible ice in 1998, as one cubic meter of combustible ice, a kind of natural gas hydrate, equals 164 cubic meters of regular natural gas.

China has been the world's largest source of tourists since 2014, reaching nearly 150 million last year, according the Ministry of Culture and Tourism.

China has never adopted a unilateral protectionist policy in trade; instead, it welcomes more quality goods from Australia entering the Chinese market, Wang said, adding that he hopes Australia will provide a more open and fair environment for Chinese investment.

China has demonstrated its role as a responsible major country through upholding win-win cooperation in the face of rising challenges from protectionism and unilateralism, Wang said

China has been constantly developing service trade pilot zones, Ma said. In 2019, there were 17 service trade pilot zones nationwide, and their trade volume accounted for over 75 percent of the national total. The development pace in the zones was faster than the national average.