The author is Xu Dachun, whose style is Lingtai. He lived in the Qing Dynasty. When studying Shanghanlun, he classified the texts not according to channel, but by formula.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzes reviews to verify trustworthiness.