As a Chinese, when I learn English,

first is to notice the difference of the pronunciation for foreign languages, I believe same as music singer, for word "Porshe", french will read "e" as "ei", English just mute, German says in the middle, but that's hard for me to memorize it in the middle, Chinese has same sound as "ei". Brain is not getting use to the iconic differences of the sound.

second is to correct pronounce the sound, pronunciation of "th" took me one week to practice, because Chinese does not have "th", only "s", that's why lots of Chinese says "sank you" instead of "thank you", that muscle to pronounce that is simply not trained since was born.