What does it mean to play twelve-and-a-half-headed gongs when traveling during the Qing Dynasty?

During the Qing Dynasty, playing twelve half-headed gongs when traveling meant sitting in a sedan chair and striking the gong 12 times in a row to clear the way. According to relevant public information, during the Qing Dynasty, when the central governors went out, they would hit 12 gongs first, so there was a tradition of playing twelve half-headed gongs when traveling, which means sitting in a sedan chair and clearing the way and knocking the gong 12 times in a row.