It depends on your current HSK level and the level you want to reach. The system is simple:
- Beginner to HSK1: 16 lessons;
- HSK1 to HSK2: 16 lessons;
- HSK2 to HSK3: 32 lessons;
- HSK3 to HSK4: 64 lessons;
- HSK5 to HSK5: Custom number of lessons;
- HSK5 to HSK6: Custom number of lessons.