About
HSK levels

    上行

    shàngxíng

    1. (of trains) up (i.e. towards the capital); (of river boats) to go against the current
    2. to submit (a document) to higher authorities

    这班火车是上行列车,开往北京。 Zhè bān huǒchē shì shàngxíng lièchē, kāiwǎng Běijīng.