The principle

"Three days became seven, five days became half a month, and in the end, it condensed into a pill!"

The testing continued until daybreak.

The Grain Avoidance Powder left over from Zhang Xuezhou's pill refinement in Shu Commandery City had finally been turned into a Grain Avoidance Pill.

All the packets of Grain Avoidance Powder had been emptied, yielding a single pill.

If the powder had been taken bit by bit, its total effective Grain Avoidance duration would have been nearly half a year, whereas the pill might last a month, or perhaps a month and a half.

Zhang Xuezhou did not take the rare, large Grain Avoidance Pill, but he knew full well that its duration was not a simple sum of the powder's.

Although the total duration was shorter, the effect of a single dose had improved tremendously.

It was almost as though the medicinal effect had increased tenfold.

Zhang Xuezhou looked at Yi Shuo, then at Rong Tianding, and finally handed the gourd back.

"Take good care of this gourd. Its ability to improve medicinal effects really is remarkable," Zhang Xuezhou said.

"I can't afford to use it!"

Yi Shuo shrank her neck.

Zhang Xuezhou could conduct a test like this, but she could not repeat it.

Over the greater part of the night, the gourd had expanded and shrunk, then swelled and expanded again, changing back and forth six times in all.

Yi Shuo could not be sure what role Zhang Xuezhou's staff had played, but she could not manage without it.

Only with the staff's help could the gourd work as it should.

Without the staff, the gourd was a useless piece of junk in Yi Shuo's hands.

So even though Yi Shuo knew what the gourd did, she had no way to use it