According to Collection of Rhymes (Jiyun), one pronunciation is yu, which sounds the same as yu (falling-rising tone). It is the same as the character hu. For a detailed explanation, please refer to the notes on the character hu earlier. Another pronunciation is xi, which sounds the same as xi (falling tone). The character hou describes the sound of many things rushing or moving rapidly. In the Ode to the Cave Flute (Dongxiao Fu) by Wang Bao, it is written: hou ye jie, jumping up and appearing once more. Zi Collection, Page Position: Upper Page 158, Entry 02