9时30分，长五工位的三个回转平台已全部打开。华佳骏 摄长征五号B遥二运载火箭计划于今日中午11时许发射空间站天和核心舱。此前火箭已完成推进剂加注。9时30分，长五工位的三个回转平台已经全部打开，等待发射。2021年中国航天发射次数将迈向40+，中国空间站建造也将转入任务实施阶段。按照空间站建造任务规划，今明两年将接续实施11次飞行任务，包括3次空间站舱段发射，4次货运飞船以及4次载人飞船发射，2022年完成空间站在轨建造，实现中国载人航天工程三步走发展战略第三步的任务目标。

At 9:30, the three rotary platforms with five working positions were all opened. According to Hua Jiajun, the long march 5B yao-2 launch vehicle is scheduled to launch the Tianhe core module of the space station at about 11 noon today. Before that, the rocket had completed propellant filling. At 9:30, the three rotary platforms with five stations were all opened and waiting for launch. In 2021, the number of China's space launches will reach 40 +, and the construction of China's space station will also enter the mission implementation stage. According to the mission plan for the construction of the space station, 11 missions will be carried out this year and next, including three space station cabin launches, four cargo spaceships and four manned spaceships. The construction of the space station in orbit will be completed in 2022, realizing the mission goal of the third step of China's three-step development strategy for manned space engineering.

中国空间站将建在距离地面约400公里的近地轨道，轨道高度是上海中心大厦高度的600多倍，可实现3人长期驻留，6人短期驻留。

China's space station will be built near the earth orbit about 400 kilometers from the ground, with the orbital height of more than 600 times the height of Shanghai Center Tower. It will enable 3 people to stay in the region for a long time, and 6 people to stay there for a short time.

中国空间站天和核心舱发射任务是中国空间站建设的“首战”。天和核心舱和两个实验舱总重将近70吨，其中天和核心舱的重量约22.5吨，相当于15辆小轿车。

The launch mission of China Space Station Tianhe core module is the "first battle" of China space station construction. The total weight of Tianhe core cabin and two experimental cabins is nearly 70 tons, of which Tianhe core cabin weighs about 22.5 tons, equivalent to 15 cars.