This is a really great character piece. One thing I love about this scene is that even in anger, Wen Ning is very much in control of himself and his actions- the anger is there, but it's not explosive-, and I found that in this fic as well, with the focus on his thoughts & resolve. The third paragraph especially really pulls off the awesomeness of Wen Ning's Implacable Walk.

Also "Built with borrowed strength, he thinks." hit hard, as did Wen Ning's determination to protect Wei Wuxian ;__; for good or bad, those two have had such an big impact on Wen Ning's life, and with just a couple sentences you've managed to summarize both relationships in a way that also contrasts them nicely. I love it.