chapter 228 The Fury of the Shadow Ninja Ancient Palace

The old man wearing Japanese clothes had a terrifying aura on his body, and the atmosphere in the whole room was depressing!

"We have been studying Yangyuan Dan of the Zhou family in the imperial capital for decades!"

"In recent years, the amount of money invested has been astronomical, but it is only now that we have vaguely figured out two-thirds of the drug formulas!"

"Now, we haven't even studied clearly the Yuan Yang Pill of the Zhou family in the Imperial Capital....