A day later, the Western Turkic Khan, leading a large army, suddenly left his original station. Contrary to what many expected, he did not head towards Xiazhou to break through the Eastern Turkic's last line of defense or rush to Luoyang to join forces with Liang Shide to crush Yu Wenye. Instead, he headed south, advancing rapidly towards Sui State.
At the beginning of July, the sun was scorching, and the heat was oppressive.
After being baked by the sun for most of the day, when many were on the verge of heatstroke and nearly falling off their horses, the boundary marker of Sui State finally appeared on the road ahead.
It was noon at this time, and the blazing sun overhead was almost enough to roast the oil out of a person. Even Ashina Zhuxie, accustomed to hard living and not much caring for this toil, still stopped his horse and immediately looked at Lei Yu, who was not far behind him: "How are you?"
