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The Asiasat 1 telecommunications satellite, carried by a Chinese-made Long March 3 carrier rocket, blasts off from the Xichang Satellite Launch Center in Xichang, southwest China's Sichuan Province, on April 7, 1990. With a Long March-3B rocket putting a new communication satellite into orbit on March 10, 2019, China's Long March carrier rocket series completed 300 launches, having sent more than 500 spacecraft into space since 1970.? (Xinhua)