TThe Hanyu Shuiping Kaoshi, (汉语水平考试), abbreviated as HSK, is the People's Republic of China's only standardized test of Standard Mandarin Chinese proficiency for non-native speakers. It is also known as the "Chinese Proficiency Test".

There are six levels for the HSK. Level 1 is Elementary. Level 2 is Elementary with Honors. Level 3 is Intermediate. Level 4 is Intermediate with Honors. Level 5 is Advanced. Level 6 is Advanced with Honors.

This app includes all the words required by the HSK from level 1 to leve 6. Level 1 has 148 words. Level 2 has 147 words. Level 3 hs 309 words. Level 4 has 583 words. Level 5 has 1230 words. Level 6 has 2499 words.

The app use flash card to help you learn all the HSK words.

The flash card uses a sophisticated algorithm to schedule the best time for a card to come up for review. Difficult cards that you tend to forget quickly will be scheduled more often.You won't waste your time on things you remember well.