Since Zhang Xueliang is the third (with his brother and sister), why is he Zhang's eldest son?

Zhang Xueliang has no brother. He is Zhang's eldest son.

Zhang Yes's child:

Eight sons: the eldest son Zhang Xueliang, the second son Zhang, the third son Zhang Xuezeng, the fourth son, the fifth son, the sixth son, the seventh son Zhang and the eighth son.

Six daughters: the eldest daughter Zhang (formerly known as Shou Fang and Xue Liangbao), two women, three women Zhang Huaitong, four women, five women and six women.

Their ages are quite different. They were born in Shoufang in 1898 and Xuequan in 1925, respectively, with a difference of nearly 30 years.

Zhang Xueliang, the eldest son of Big Data, was born in 190 1 year by Zhang Yuan's wife Gui, and was called Jong. 1920 graduated from Wujiangtang of Northeast Army. After Zhang died in the "Huanggutun Incident" in 1928, he succeeded as the security commander-in-chief of the three northeastern provinces. He insisted on "changing the flag in the northeast" and completed the reunification of the north and the south. Later, he served as the deputy commander-in-chief of the armed forces of the Republic of China and the first-class general of the army.

1936 After the Xi Incident, he was placed under house arrest by Chiang Kai-shek and his son for a long time. /kloc-resumed personal freedom in 0/990, 1995 left Taiwan Province to live in Hawaii, USA. He passed away in Honolulu in June of 10 at the age of10/.

Baidu encyclopedia-Zhang