Syllable Finder
Consonants
Tones
Vowels
Duolingo Topics
100 Topics
Listening Comprehension
Translation Skill
200 Essential Words
1000 Most Frequent Words
2 New HSK word(s): 6 作废 → + to become invalid/ to cancel/ to delete/ to nullify 6 算数 → + to count numbers/ to keep to one's word/ to hold (i.e. to remain valid)/ to count (i.e. to be important)