On weekdays, when I have dinner with my friends in a restaurant, I always see a dish called "Mu Xu Meat". When I ordered it, it turned out to be fried pork slices with eggs and cucumbers, which was inexplicable. What is "moo Shu pork"? Yesterday, when I was reading Mr. Xu Tongqiang's history language, I got it by accident.

Teacher Wang gave an example when his pronunciation changed due to the influence of the front and back sounds: In Beijing dialect, the word "egg" is called "mother" and the sound is [Li Mu], but if light is literally [mother] sound, according to the law of sound change, [xi] is influenced by the previous "mother" sound, so it is written as "mother" sound.