The stall owner's nervousness made Shen Qiang realize that the longevity lock must be something good; otherwise, the old guy wouldn't have pretended not to understand and pushed away the person who had looked at the longevity lock before, then turn around to buy it himself.
Feeling somewhat nervous as he looked at the longevity lock, Shen Qiang used the Observation Skill, and the moment the longevity lock magnified in his eyes, he immediately stopped the cultivation technique.
An image flashed in his mind.
Shen Qiang immediately understood that the longevity lock was made of Kunlun jade, also known as Nephrite jade.
It had been in existence for 223 years.
A simple reverse calculation pinpointed this to the late Qianlong period.
A Nephrite jade longevity lock with a silver chain from the late Qianlong period should not be very expensive though, despite knowing that the stall owner would surely profit from buying it, it was hard to say by how much.