Liu Xiaoyan Level 4 is on the platform of official website for postgraduate entrance examination. There are four courses related to Mr. Liu Xiaoyan, which can be watched on the postgraduate entrance examination platform in official website. Moreover, the above courses are also divided into charging and non-charging courses, and some live classes related to English writing in Liu Xiaoyan are also very effective. Therefore, Liu Xiaoyan Band 4 is on the platform of official website for postgraduate entrance examination.