Shortcomings of accent of Linyi people in Shandong Province

The back sound of the tip of the tongue is not in place, the front sound of the tip of the tongue is made into an interdental sound, and the tongue sound is made in front. Linyi dialect spans two dialect areas, Xilu District and Dongwei District, with rich phonetic features. In Linyi dialect, it is common that the back of the tip of the tongue is not rolled in place, the tip of the tongue is pronounced between teeth, the tongue surface is pronounced in front, and the vowel syllable of R is zero, which is unique to the Eastern Wei Dynasty.