What do you mean, "General Northwest will have eight cows"?

This sentence is a fortune teller's prediction from TuiBei Map when General Zhang Xueliang went to Shanghai:

General Northwest: Yang Hucheng is called the Northwest Army. At that time, Zhang Xueliang and Yang Hucheng were both in Xi 'an.

The northwest generals should be Zhang and Yang.

Eight cows are combined into Zhu, Zhu, Zhu and Zhu. Eight cows refer to the Red Army.

This sentence refers to the Xi incident.