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HSK levels

    招呼

    zhāohu

    1. to call out to; to greet; to say hello to
    2. to inform
    3. to take care of; to take care that one does not

    我看到老朋友,就招呼了一声。 Wǒ kàndào lǎo péngyou, jiù zhāohu le yī shēng.