They are all online sparring, one is online live sparring, and the other is AI sparring. Real-life sparring is the teacher's video sparring, which can intuitively correct children's pronunciation mistakes. Teachers can also make correct demonstrations online, which is very intuitive. AI sparring is artificial intelligence. You can download the software and use it directly on your mobile phone to correct pronunciation errors. There are many other functions, such as evaluation and scoring. The price is much lower than that of real sparring.