This could be considered a small anti-counterfeiting mark that Lin Jing had come up with, although its use might not be very significant.
The moment he saw the Pure Jade Box, the corner of Lin Jing's mouth twitched.
"Buying my own elixir medicine, to give it to myself."
"This Huang Qingling..." Lin Jing was at a loss for words for a moment.
"However, he doesn't know that the Elixir Valley Heir is himself." Thinking of this, Lin Jing also let it go.
"Right."
"Fellow Daoist Qing Ling, where did you buy this elixir medicine? How many Spirit Stones did it cost?"
Lin Jing remembered clearly that Huang Qingling had never been to the black market, and he himself had never sold elixir medicine to her.
Huang Qingling, stroking the Pure Jade Box in her hand, said:
"You don't know, the elixir medicines sold by the Elixir Valley Heir are now very expensive; this was acquired by Old Man Bai from someone else's hands."
"Just this one pill cost 800 Lower Grade Spirit Stones."