 Both He Yan and Wang Bi were known for their expertise in the Yijing. Both were deeply interested in the Laozi. Wang Bi’s Laozi and Yijing commentaries occupied an esteemed place in the formal Xuanxue curriculum, and arguably they remain the most important philosophical treatment of the two classics today. However, it should be noted that both He Yan and Wang Bi wrote on the Confucian Lunyu (Analects) as well. Through their extant writings, we gain a good view of the main contours of Xuanxue philosophy.