In fact, the factor that determines the learning cycle is not the strength of English foundation, but the learning energy and time invested in the preparation stage; Generally speaking, the study duration is more general, but in fact, we should pay more attention to the effective study duration every day.
If the candidates have a general foundation, but they can devote 1.5 hours to preparing for the exam every day, the effect will be much more efficient than that of IELTS candidates with good foundation. Even if he spends more time preparing for the exam than the former, the former will be more efficient.