Lan Wangji didn’t have much of an impression of Jiang Cheng at first, during his time at the Cloud Recesses. He was supposed to have joined in the first round of lessons with him, in fact, but he’d instead chosen to remain in seclusion a few extra months, focusing on strengthening his will and his heart, and that meant that he'd missed this Wei Wuxian fellow - probably for the best, since he seemed like he’d require a great deal of effort and forbearance. It wasn’t until later that he started appreciating Jiang Cheng.