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Scientists upgraded the varieties, which were grown in a temperate zone in China to adapt to a tropical climate. The target countries choose from abundant varieties with diverse superiority according to their local agriculture conditions including drought, submergence and problematic soils.

QINGDAO, April 20 (Xinhua) -- Naval delegations from over 60 countries Saturday began to arrive in the port city of Qingdao, east China's Shandong Province, to join multinational naval events commemorating the 70th anniversary of the founding of the Chinese People's Liberation Army (PLA) Navy.

Over the past six years, total trade between China and other countries participating in the BRI has exceeded 6 trillion dollars, and China's investment in these countries has surpassed 80 billion dollars. Also, the latest studies by the World Bank and other international institutions show that BRI cooperation will cut the costs of global trade by 1.1 to 2.2 percent and contribute at least 0.1 percent of global growth in 2019.

China also contributed the biggest share to the global reduction of the use of ozone-depleting substances, accounting for more than half of the total reduction by developing countries.

QINGDAO, April 23 (Xinhua) -- Dozens of military vessels flying different national flags lined up in waters off east China's port city of Qingdao as fighter jets streaked across the sky in formations.