Syllable Finder
Consonants
Tones
Vowels
Duolingo Topics
100 Topics
Listening Comprehension
Translation Skill
200 Essential Words
1000 Most Frequent Words
3 New HSK word(s): 5 洞 → + cave/ hole/ zero (unambiguous spoken form when spelling out numbers)/ CL:個|个[ge4] 6 洞穴 → + cave/ cavern 6 空洞 → + cavity/ empty/ vacuous