The Internal Development Perspective on the Tonal Re-Classification of the Ru Tone with Voiceless Initials in Beijing Dialect (北京話清入字歸調的內部演化視角)

This paper analyzes the re-classification of the Ru tone with voiceless initials in Beijing dialect from the perspective of internal development. The main factors that cause the Ru tone to change into four different unchecked tones are the laryngealization feature accompanying the loss of stop endings and the rotary change of high and low in the unchecked tones.本文從內部音變的角度重新闡釋北京話清入歸派現象，認為清入字韻尾消失後對音節發聲形成的緊喉音色，以及北京話聲調調值的高低環流變化是造成清入字派入四聲的原因。(This article is in Chinese.)