635:

"This, this is too bizarre, right?" she said, dumbfounded. "Addicted? It's my first time hearing that one could get addicted to such a thing? And it's not just one or two, but all women in Dayuan are like this? After they begin, they all go through this process?"

Yun Ge raised an eyebrow and then said calmly, "Otherwise, why do you think women of Dayuan marry so many men? On one hand it's because of the law, on the other hand it's because an addiction comes on and a single man isn't enough to satisfy it. I remember this seems to have started with our ancestor from Divine Medical Valley..."

Divined Medical Valley, also known as Medicine Valley, according to Yun Ge, had a very close relationship with the founding empress in the early days.