About
HSK levels

    ràng

    1. to let sb do sth; to have sb do sth; to permit
    2. to make sb (feel sad etc)
    3. to yield
    4. by (indicates the agent in a passive clause, like 被[bei4])

    请让我帮你一下。 Qǐng ràng wǒ bāng nǐ yīxià.