C608 An Alchemist from Yan Yun(2)

When they first got the recipe, it took them two or three years to sort it out.

Although Ling Feng had the help of the three of them to comprehend it, three days was really too short.

However, in order to ensure that there was a possibility, Ling Feng still spent another day to explore it, and even brought up some of his own opinions.

Wu Yong and the other three were shocked