S1·E16 Episode 16

When Wei Wuxian and Jiang Cheng are on a boat, they meet with Jiang Fengmian who came back. They told him everything. Then Jiang Fengmian ties Wei Wuxian, Jiang Cheng and Jiang Yanli and let them go far away from home. As for him, he goes back to Yunmeng Jiang Sect to save his wife. On that night, Yunmeng Jiang Sect is completely destroyed by Qishan Wen Sect. From now on, Wei Wuxian, Jiang Cheng and Jiang Yanli have to depend on themselves. On the run, while Wei Wuxian goes outside to buy foods, Jiang Cheng gets out. By the time Wei Wuxian is back, he finds out Jiang Cheng has been captured by Qishan Wen Sect. So, he goes to Yunmeng Jiang Sect to save Jiang Cheng.