True Three Kingdoms 7, Jin Chuan-Wen Qin rebellion, how to achieve the IF condition?

I seem to have made a mistake and got you an original text. To achieve this condition, we must let the surprise attack fail. If you want to fail the surprise attack, don't let the general surprise attack. If you don't want the general to attack suddenly, choose the general yourself. Yes, it is to choose Sima Shi. Otherwise, if the surprise attack is successful, we can't finally break Wen Qin and his son. First, follow the prompts to the center of the map to start the first Wen Yang incident. After returning to this array, we set out from the mountain road in the west, attacked Xicheng, and waited for reinforcements from Wu. The message prompts a sneak attack on the eastern city. Ignore the prompt at this time. Continue to wait for the second and third batch of Wu reinforcements. After breaking Ding Feng, jump from the northwest path of the map to the center of the map. At this time, Wen Qin will not leave the city, and the system just shows that the surprise attack failed. After that, he quickly withdrew from the array to prevent a second attack in Wen Yang. Then clean up the public face on the map. Except Wen Qin, and Wu. When there were only three people left on the local map, they broke into Dongcheng from the center of the map. After destroying Wen Qin and his son, going to the north city to destroy Wu will trigger if.