语音系统有自己的演变方向和规律，可以从复音词根占优势成为单音节词根占优势和有音节声调的类型。汉台苗诸语语音类型上的相似应是共同基础上相互影响的结果。汉、侗台、苗瑶和藏缅诸语有同源关系，汉语和藏缅语词汇上的相近除原有的共同成分外，当与上古早期密切接触有关。 The phonetic system has its own direction of evolution and regularity, which can be dominated by polyphony stems and become the type of monosyllabic stem predominance and syllable tone. The similarities between phonetic types in Chinese and Taiwan languages ​​should be the result of mutual influence on the common ground. Han, Kamtai, Taiwan and Maui have homologous relations with Burmese and Burmese. The similarities between the Chinese and Tibetan-Burmese terms are similar to those of the earlier common except that they were closely related to the early antiquity.