When the other person approaches you, her outstretched arm is lower than yours, ready to hug your body. This posture often happens when the other person is younger than you, of course, it is not necessary. In response to such a hug, we need to be higher than his or her arm, and it is often the other person who hugs you in this posture who is taller than you. It's hard for you to take the initiative in such a hug. I suggest you respond with a posture lower than his or her arm at this time.