Move upward and forward the front part of your tongue surface and make it approach the front hard palate, with a narrow chink left; pronounce with the breath squeezing out from the chink.
Move upward and forward the front part of your tongue surface and make it approach the front hard palate, with a narrow chink left; pronounce with the breath squeezing out from the chink.
发音时，舌面前部向上向前，接近硬腭前部，中间留有窄缝，气流从窄缝中挤出而发声。