"I found a tea in my room and it said Inquiry so I took a chance. I was curious to see if it was what I thought it might be. And then..it was like I just knew I could do it. I wasn't sure I could do it with Chenqing but..it worked."

Wei Wuxian has been trying each of the doors they pass in the stairwell but they have all been locked. He uses Inquiry at one point and the spirits keep telling him to go higher. And eventually they get to one door that isn't.