What role did Zhang Xueliang play in the Xi incident and what happened to his subsequent imprisonment?

1930 10 after the death of Yang Kaihui martyr, Mao, Mao Anqing and Mao Anlong took refuge in Shanghai. Soon, Mao Anlong died of illness, and Mao Anying and Mao Anqing were adopted by pastor Dong Jianwu and lived a hard life for several years. Dong Jianwu is an underground party member. He graduated from St. John's University and studied under Song Ziwen. ?

Because the snow closed the mountain and the road was blocked, I had to ask Zhang Xueliang for help. Zhang Xueliang personally drove him to the airport, and an American pilot flew Zhang Xueliang's plane to take him to Yan 'an. Since then, the two have forged a profound friendship. 1936 in the first half of the year, Dong Jianwu was entrusted by Soong Ching Ling to escort American journalists and Dr. Ma to the Soviet area in northern Shaanxi and came to An again.

Zhang Xueliang and his wife like porcelain very much. In order to connect their feelings, they could buy some pieces of porcelain for him, and Liu Ding agreed. So Dong Jianwu went to Nanyuanmen to find an antique shop. Shopkeepers often go to Shanghai to handle goods, and they are very familiar with Dong Jianwu. Dong Jianwu bought a set of colored porcelain from him.

Give it to Zhang Xueliang. I can't put it down when I see them. You must spend a lot of money to buy them. Dong Jianwu refused to accept it. Later, Zhang Xueliang heard that Dong Jianwu was going back to Shanghai, and Zhang hosted a family dinner to see him off. During the dinner, Zhang asked him what he wanted, and Dong said, "I am willing to stop the civil war and unite against Japan!" Zhang nodded and said yes.