He had known about this when Lingyun came to them. He knew how important Lingyun was and whether Piaomiao Pavilion was able to get what they needed depended on her. So Qianji stopped whatever he had been doing and came to listen to their conversation.
He could not show up to disrupt their talk. Wuxing needed to be left to talk her through.
So Qianji heard the whole conversation.
He was furious.
But not as furious as Wuxing.
Perhaps that was because Qianji had observed how Lingyun, during her time at Piaomiao Pavilion, had gradually shed her submissive nature and stopped fixating solely on Wuxing. She had grown beyond being completely consumed by him, and Qianji had witnessed her rediscover her own individuality.
Women were dumb, but they were fickle.