Yes, I took the IELTS test in Grade Two and Grade One. I studied IELTS all over the world for two months in the summer vacation and got 5.5, but I took it in Beijing. I suggest you take the exam in some remote places, such as the examination room in Dalian, and try not to take the exam in big cities, because the oral examiners in small places will be considerate of the accent problem and will be more relaxed. For example, in city english, the spoken English score is 4, and in small places it may be 4.5 or even 5.
And if you want to improve your grades quickly, especially your listening performance, I suggest you recite the basic classics, which is particularly useful, but you have to work hard.