The second reason is that Zhuge Liang needs some time to improve his reputation, so that he won't have to start from scratch as a pawn. On the surface, Zhuge Liang cultivated land in Nanyang, but in order to improve his fame and integrate into the mainstream society of Jingzhou, Zhuge Liang married Huang Yueying with a strong background. Therefore, Zhuge Liang was able to sneak into the upper class of Jingzhou by virtue of his own ability, and eventually became famous.
The third reason is that Zhuge Liang needs to analyze the world situation clearly so as not to be at a loss after coming out of the mountain. Due to the chaos in the world at the end of the Eastern Han Dynasty, Zhuge Liang certainly didn't know how and to what extent the situation in the world developed. So at that time, Zhuge Liang could only sit tight and wait for himself to thoroughly analyze the situation in the world before coming out of the mountain, otherwise the young Zhuge Liang might be at a loss in the face of chaotic situation.
The fourth reason is that Zhuge Liang needs to see who is a wise master and who can give himself a platform to display his talents, so that Zhuge Liang can find his own master. After all, at that time, it was an era when heroes rose together. There were too many people who ruled the world. At that time, news spread very slowly. Therefore, while paying close attention to the situation in the world, Zhuge Liang is also analyzing who is the most suitable master, so that Zhuge Liang can find the platform that suits him best.