单双循环公式的推导过程简介：Zhang Jiayu did not take credit, saying that he did not come up with it himself, but that he gathered the generals in the camp to discuss it together, and asked the boss Zhen Wu Xiang for the final conclusion.
Zhang Jiayu did not take credit, saying that he did not come up with it himself, but that he gathered the generals in the camp to discuss it together, and asked the boss Zhen Wu Xiang for the final conclusion.
