Why did Zhuge Liang's three brothers take refuge in the Three Kingdoms respectively? what is the purpose?

Zhuge Liang's three brothers refer to Zhu Gejin, Zhuge Liang and Zhuge Dan respectively. In addition, Zhuge Liang has a younger brother named Zhuge Jun, but actually Zhuge Dan is just Zhuge Liang's younger brother. Zhuge family was originally a noble family of Langya. Zhuge Xuan died in 187, when Zhuge Liang was only 8 years old, so he and his younger brother Zhuge Jun lived with his uncle Zhuge Xuan, while his older brother Zhu Gejin 15 years old had already started to live independently. At that time, the Central Plains was in turmoil and wars continued, while Jiangdong was relatively stable, so Zhu Gejin avoided the Jiangdong rebellion. Because of his brilliance, he avoided chaos.

Zhuge Liang is also ambitious. Although he lives in seclusion in Longzhong, Nanyang, he has been analyzing the world situation and waiting for the wise master. Finally, Liu Bei, together with his Han descent, successfully invited Zhuge Liang to help him realize his great ambition. Zhuge Liang and Zhu Gejin are brothers, and Zhuge family has a strong family style. They are loyal to different monarchs, and they all do their jobs. Although their camps are different, they both want to do something big.

Zhuge Dan is Zhuge Liang's younger brother, who lives in Wei, so it is natural to be loyal to Wei. The three of them are very different in age and may not have met each other. They are only distant relatives, and Wei attaches importance to family background, which is also the reason why Zhuge Dan can successfully become a general of the Western Expedition.

There is also a saying that Zhuge family is a noble family, and it is necessary to carry on the family line, so Zhuge three people are transported to different governors, and no matter which side wins, they can continue the family line. Zhu Gejin was in Wu Dong, Zhuge Liang and Zhuge Jun were in Han Shu, and Zhuge Dan was in Cao Wei. Unfortunately, the descendants of the three failed to get good results.