The escape of Zhao Jia did not come as a surprise to the Qin army.
If anything, Zhao Jia was actually far more qualified to declare himself king than Zhao Cong.
Before Zhao Qian became the crown prince, Zhao Jia had held that position. Known variously as Crown Prince Jia or Lord Jia, he was the most rightful eldest and legitimate son of the State of Zhao.
Chapter 620