魏晋六朝是我国历史上民族接触和民族语言融合的重要时期。《颜氏家训·音辞》曾记载当时的语言状况:“南染吴越,北杂夷虏”。比较《经典释文》所引的《字林》与徐邈音注,考察晋代鱼部的情况。认为晋代吴方言古鱼部与古侯部整体呈分立的状态,但唇、牙喉音的古鱼部的虞韵字与古侯部的虞韵字有合流的趋势。用晋代诗歌押韵材料作进一步证明。认为北语在南渡之后受到了当地吴音的浸染。 The Wei, Jin and the Six Dynasties are important periods in our country’s history of ethnic contact and national language integration. “Yan’s Family Instructions sound language” had recorded the language status at that time: “Southern dye Wu Yue, North Miscellaneous yi prisoners ”. Compare the “word forest” and “Xu Lin” notes quoted in “Classic Interpretation” to examine the situation of Jin Department of Fish Head. It is thought that the ancient fish department and the ancient Hou department in Wu dialect of Jin Dynasty are in an entirely separate state. However, there are a tendency of confluence between Yuyun characters of ancient fish department of lip and dental throat sounds and Yuyun words of ancient Hou department. Use Jin Dynasty rhyme material for further proof. It is believed that the Northern language was affected by local Wuyin after Nandu.