Query: What is the first river that the 40th, 3rd, and 6th Japanese divisions crossed while advancing southward?
Context: In mainland China, the Japanese 3rd, 6th, and 40th Divisions massed at Yueyang and advanced southward in three columns and crossed the Xinqiang River, and tried again to cross the Miluo River to reach Changsha. In January 1942, Chinese forces got a victory at Changsha which was the first Allied success against Japan.