Why do the two dots on ü disappear after j, q and x?
为什么 j、q、x 后面的 ü 要去掉两点?
j, q and x never pair with the normal u sound — they only ever pair with ü. Because there is nothing to confuse them with, pinyin drops the two dots and writes ju, qu, xu. The sound is still ü.
小 ü 见到 j、q、x 就摘掉两点,读音还是 ü。
n and l keep the dots, because both nu / nü and lu / lü exist: nǚ 女 (woman) is not nǔ 努 (to strive).
