The god of thunder gets Yuan Zheng’s spiritual weapon from Jing Xiu. While at the front gates, Ling Xi accidentally drops the eternal knot that is Jiu Chen’s and Jing Xiu picks it up and keeps it. Ling Xi sees that Jiu Chen is suffering from the icy disease and rushes to warm him, helping him out of his recent relapse. (Source: frankly at MyDramaList)