《马氏文通》：名有一字不成词，间加“有”字以配之者，诗书习用之。…… 书经邦曰有邦，居曰有居，夏曰有夏，政曰有 政。易经家曰有家，庙曰有庙。诗经北曰有北，吴 曰有昊，梅曰有梅。左传济曰有济，帝曰有帝。而 国号之上，率加“有”字，如有虞、有夏、有殷、有周 之类， “Markov letter”: the name of the word is not a word, plus “have” to match those who, poetry and learning habits. ...... Book by the state said there are states, Habitat said there is a home, Xia said summer, politics said politics. Yi Jing said that there is a temple, temple said temple. There North North Song poetry, Wu said there Hao, Mei said Mei. Left Chuan Ji said economy, emperor said there is emperor. The country code above, the rate plus “have” word, if Yu, there summer, Yin, Zhou like,