oice, as always, came from within."Teacher Wu, it's me, Xie Xie. My brother and I have a question we'd like to ask you," Xie Xie said."Come in." The door opened, revealing a sleep-clad Buchan 空 inside...vil. 。That's right, the whirlwind of chaos, seven metals fused together 。After precise calculations by Ling Zichen, it was discovered that the higher the level of refinement, the more difficult the...