0
-
"1"
Jane 22 years old learning period:5 monthsStarted from pinyin
-
"2"
Lily 15 years old learning perid:12 monthsStarted from the very beginning
-
"3"
Mike 15 years old learning period:15 monthsStarted from pinyin
-
"4"
Jesse 23 years old learning period:2 monthsStarted from the very beginning
-
"5"
William 33 years old learning period:6 monthsStarted from the very beginning
-
"6"
Sherry 19 years old learning period:5 monthsStarted from listening and speaking strengthening