An Jing said, "Carrying a burden of forty taels."
The new recruits: "..." This is deadly...
...
As the appointed hour arrived, An Jing and Ye Zhi led out of the camp ten female soldiers each burdened with forty taels.
An Jing and Ye Zhi both led a horse; these were for them to ride on the road. They were instructors, and they needed to conserve their strength to train the new recruits with more energy every day.
Moreover, it was now a cross-country march for the new recruits, which means carrying a heavy load for a long distance, something that doesn't require their instruction, so they didn't need to carry a load and walk like the new recruits.
Xiao Changyi, accompanied by Meng Zhuqing and Qin Yi, joined An Jing and the others on the cross-country march. Of course, Xiao Changyi, Meng Zhuqing, and Qin Yi were also on horseback.