It is privately assumed that Xiao Qian drank a little bit of Duanhunsan in order to be realistic. Although he controlled the amount, he still underestimated the power of Duanhunsan. Although Shaojun fed him a mouthful of dragon bone, which prevented Xiaoqian from being directly poisoned, it also hurt his body and turned it into cancer.
Intention: Xiaoqian was hit by the soul-breaking powder, and the dragon bone can only save one person