because the lingual sound jqx can't be spelled into syllables with vowels that start with "A, O, E" and "U", it can only be spelled into syllables with vowels that start with "I'm happy" and "U".

the rules of forming syllables by j, q, x, y and ü:

① Xiao ü Xiao ü is really naughty. When you meet j, q, x and y, you should read ü after removing two points. Note: j, q, x and y are never with u.

②ü There are only six initial friends, two points should be removed when making friends with J, Q, X and Y, but not with N and L.