In Chinese grammar, the character "着" is used to express the existence or state of an action or situation. This intermediate level grammar point, found in the HSK level 3 curriculum, is used to indicate that an action is ongoing or in progress. By adding "着" after a verb, it changes the meaning to show that the action is currently happening or in a continuous state. Mastering the usage of "着" can help learners convey more nuanced meanings in their Chinese sentences.