However, Anyang paid special attention to information reconnaissance during the march, especially high-altitude reconnaissance. This time, Anyang dispatched several new aircraft to conduct reconnaissance at an altitude of more than 10,000 meters. After these aircraft flew to high altitudes, they turned off their engines and relied entirely on the formation to float and hide.
It can be said that most of Cai State’s actions were under Anyang’s nose.
Naturally, the Cai Emperor's retreat was also discovered by Anyang; now, this information was delivered to Yan Zhengqing.
"Through continuous observation and tracking, and even using the latest magic weapon 'Thousand Mile Ears', we were able to detect the sound of their conversation. All the information has been stored in the jade slip."
Yan Zhengqing took the jade slip and read it carefully. The information in the jade slip was very detailed, and Yan Zhengqing could see it clearly as if he had seen it with his own eyes, and even some conversation sounds were used as "annotations".
In about a cup of tea, Yan Zhengqing finished reading all the information and said, "Good, very good."
After Yan Zhengqing finished speaking, he took out the Lingtong Baojian and directly contacted the Tang army more than 150 miles away, contacting Li Wei, "General Li, I suggest that we stop advancing and let the soldiers rest for a while."
The maximum communication distance of Lingtong Baojian is only one hundred kilometers, but Anyang has the relay technology. When the army is marching, there are planes specially responsible for communication hidden in the sky.
Li Wei had already been overwhelmed by the continuous victories, and when he heard that he wanted to stop moving forward, his first reaction was to disagree. But thinking of Yan Zhengqing's ability, Li Wei finally asked, "Why?"
"Wait a moment. A plane will deliver the message soon. Please wait here for a while. It will take about two cups of tea."
"Okay." Li Wei finally ordered to stop advancing. In this way, the armies of Anyang and Tang stopped 50 kilometers away from Shangyongcheng, the capital of Cai.
In less than two cups of tea, the plane landed in front of Li Wei and handed him the jade slip. Li Wei didn't care to admire Anyang's technology, and immediately picked up the jade slip to check it. This time, the jade slip not only contained the technology detected by the pilot, but also the explanation and analysis that Yan Zhengqing had just entered:
"The Cai royal family and elites have already moved, so there are three possibilities for Shangyong City now: first, a trap; second, an empty city. The third, and most likely possibility, is that it has become a solid fortress, holding back our three armies and buying time for the Cai high-level officials to retreat. But no matter what, the Cai high-level officials have moved, and we won't gain anything by attacking Shangyong City now, and we may even suffer casualties and delay the opportunity to fight."
"According to my analysis, the transfer of Cai's top leaders to the north meant that they had abandoned a large area of land in the south of Cai. Further speculation is that when Cai moves north and regains its stability, there is an 80% chance that it will open the western border and let Chen and Zheng in. There is even a 50% chance that it will open the northwestern border and let the further north Deng in. At that time, the land south of Cai will be in chaos, and Cai will inevitably take advantage of the situation. Once that happens, it will be difficult for us to stop the joint attack of Chen, Zheng and other big countries."
"Stop it. Our fundamental purpose is not to destroy the State of Cai. Our fundamental purpose is to seize territory. Let the western part of the State of Cai be given to the State of Xiao, and let the State of Xiao temporarily face Shangyong City and the upcoming chaos independently. We will take the opportunity to consolidate the places we have occupied and completely digest and absorb them."