Sang Zhi left half of the Guilingji with him, as previously agreed, noting that the medicine would be highly effective for his recovery in the later stages. She also paid the full amount as agreed.
As for the formula:
"I cannot speak for what will happen in a few decades or centuries. But as long as I am alive, this formula will remain well-preserved and will not fall into the hands of the enemy. Furthermore, the profits generated will be split equally with the Hong family."
After saying this, she wrote out a formal pledge, signed it, and pressed her thumbprint on it. She had the other party sign it as well. They kept one copy each.
Chapter 176