How does the History of the Three Kingdoms 9 change the intelligence of military commanders?

There are two ways to improve intelligence in the three countries. The first is the event. For example, if you visit Yuji and talk to him, he may give you some books to improve your intelligence. There are also some events that can improve intelligence, and we should always explore them. The second is to rely on foreign objects, that is, titles and treasures, and titles are needless to say. Treasures, such as the Book of Rites in Chengdu and the Book of Changes in Xiangyang.