Yang's book is the first historic-graphical work to fully discuss Zhang Xueliang's relationship with the CPC leadership, and also presents a new interpretation of the factors directly behind the Xi'an Incident.
多本著作，探討事變原因楊著是第一本全面探討張學良與中共中央關係的史著，同時為西安事變的直接起因提出了新的解釋。