After the founding of the new China, strategic principle of the active defence has been set up and offensive thinking has been combined with defensive one more perfectly, which is the third period.

• 土地革命战争中，提出了“十六字诀”作战原则，形成了“积极防御”的战略思想，防御是为了反攻和进攻，这就包括战略进攻的思想要素。