Tips for the “üe (yue)” sound:
“üe” starts with “ü” and quickly goes to “e” as in “ie.”
Tips for the “üan (yuan)” sound:
Starts with “ü” and quickly goes to “an.”
üan = ü + an
Tips for the “üen (un)” sound:
ün = ü + en
It starts with “ü” and then goes on to “en” quickly.
The “e” in “en” will be dropped.