Hujia is a fringe air-sounding instrument, a kind of musical instrument of the ancient northern peoples in my country. In Fu Xuan's "Preface to Jia Fu" in the Western Jin Dynasty, there is a sentence: "Jia leaves are the sound". The word "Jia" was the word "Jia" in the Han Dynasty. "Shuowen" contains: "Jia, reed is not yet beautiful", "Reed, big Jia also." Jin Dynasty G...