Textbooks touted the maglev train as the future, but why didn't it become popular?

Today, the Zhengzhou-Xuchang intercity light rail began trial operations in Xuchang, Henan.

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这就是中国速度！新型磁悬浮列车时速高达620公里 速度堪比飞机 20210715 《透视新科技》CCTV科教

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