Mandarin pronunciation guide maker

什麼是 Mandarin pronunciation guide maker？

I was stuck at a plateau with mandarin. Knew pinyin, could nail tones — but natives kept switching to english. Turns out my mouth was defaulting to english shapes. So I built a diagnostic system to identify which habits were breaking my pronunciation and retrain them with physical mouth placement. Includes a 90-day plan. For learners who know the theory but can't sound natural yet.