What influence and function did the peaceful settlement of the Xi incident have on the formation of the anti-Japanese national United front?

The peaceful settlement of the Xi 'an incident marked the initial formation of the second cooperation between the two parties, and paved the way for the turning point of War of Resistance against Japanese Aggression in the future. Making the two parties work together in Qi Xin on the anti-Japanese front has greatly enhanced the anti-Japanese military strength, and at the same time enhanced the people's and the country's hope for victory in the anti-Japanese war (if there are any imperfections, we can talk about them in the light of the times).