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China plans to launch the heavy-lift carrier rocket Long March-9 in 2028, said an official of China National Space Administration (CNSA) at the World Conference on Science Literacy 2018 on Tuesday. 中国国家航天局一位官员周二在2018世界公众科学素质促进大会中表示，中国将于2028年发射长征9号重型运载火箭。 Li Guoping, director of the Department of System Engineering of the CNSA, said that the length of the Long March-9 will exceed 90 meters, and the rocket would have a core stage with a diameter of 10 meters. It would be able to carry a payload of 140 tonnes into low-Earth orbit, five times that of the Long March-5, said Li. The rocket's capacity would also reach 50 tonnes for Earth-Moon transfer orbit. China is also developing a medium space rocket, the Long March-8, which is expected to make its maiden1 flight in 2020. The Long March rocket series have been launched 284 times, sending more than 400 spacecraft into space.