what did louise tell general shang

Louise told General Shang his wife's dying words in Mandarin, which translate to: "In war, there are no winners, only widows." She used this message to convince him to stand down from attacking the alien ships. This moment is crucial because it demonstrates that Louise, having learned the alien language and its non-linear perception of time, could contact Shang in the past with information she only learned in the future. By telling him these words, she proved her knowledge and persuaded him to avoid war, emphasizing the devastating consequences of conflict and the importance of communication to prevent it