TIPS&TRICKS for j q x|Chinese Pronunciation#2: Chinese Alphabet, Why ü without umlaut (New in 2019)

Learn Chinese Pronunciation#2: Chinese Alphabet, Why ü without umlaut (New in 2019)

TIPS &TRICKS to learn j q x. j+ ü=ju, q+ü=qu, x+ü=xu, WHY?

WHY does ü go without umlaut when it goes after j q x ?