Su Yijia wasn't particularly surprised.
The kinds of missions Qin Kaize had done in the past surely required such preparations. He carefully fixed her hair and then put on a wig for her—a style typical of a country man who hadn't cut his hair in half a year. It looked a bit messy but was just enough to cover most of her eyes and brows, though it would make it a little difficult to see later.
The exposed skin was all coated with a dark, foundation-like substance.
“This is a special material,” Qin Kaize explained as he applied it, “It's a bit suffocating, but it won't come off when you sweat or come into contact with water, unless you use a very hot, damp towel to wipe it off.”
Finally, he dressed her in a set of worn, but still intact, hemp clothes.
Looking at her reflection in the mirror, Su Yijia even subtly hunched her back to match the disguise.