Because those musical instruments were initially brought to the court from abroad. They were initially used as a band for the court, used at meetings with important guests and banquets, and then evolved into a form of boosting the morale of soldiers. In China , have always had a high status. It can be said that they are more respected than Chinese suona and other classical instruments, so they are popular in China. Since the people do not know their real names, they are named after their source, foreign drums and foreign trumpets