About
HSK levels

    chū

    1. (bound form) at first; initially; (bound form) first; early
    2. (bound form) (in lunar calendar dates, before numerals 1–10) days 1 to 10 of a month, as in 初三[chu1 san1] "the third"

    初时我不太理解这个概念。 chū shí wǒ búkuài lǐjiě zhège gàiniàn.