进一退二法倍投法优缺点

简介：——The army of 150,000 went out to fight, but now there are only more than 20,000 people left. Confidence has been lost, and the food, grass and baggage are almost gone. Under this situation, it is no longer possible to fight. Now Dorgon can do it The only thing is to return to Shengjing and strengthen the defense in preparation for the final decisive battle.