If the Southern Song Dynasty and the Western Liao Dynasty had joined hands at that time, would it have destroyed the State of Jin?

The Southern Song Dynasty and the Western Liao Dynasty could not be unified. As long as you look at the map, you will know that the location of Xiliao is not adjacent to Xu Jinguo or the Southern Song Dynasty. If you want to attack Xu Jinguo, you can only cross the territory of Mongolia and Xixia at that time, which was obviously impossible at that time. With this strength, it is better to destroy Mongolia and Xixia first. Even if we sent troops to join the Southern Song Dynasty and then * * * the Northern Expedition, we would have to cross the Qinghai-Tibet Plateau at that time and even Dali in the Yunnan-Guizhou Plateau.