Miao Yingyao told Yu Xiaolian about the benefits of the Longevity Gu that she knew.
Longevity Gu—grants longevity.
Of course, it's not immortality, just a longer life span than ordinary people. According to Miao Yingyao, living to a hundred shouldn't be a problem.
In ancient times, when the average life expectancy was thirty-something, living to a hundred was indeed considered longevity.
That counts as a benefit.
No illness or pain, maintaining a youthful appearance unchanged, can also be considered a benefit for some people.
It can suppress other Gu worms, thereby controlling its master's thoughts, this...
This is a bit terrifying...
The Longevity Gu, however, is not without drawbacks; it has side effects, and for women, they can be deadly.
Miao Yingyao's throat moved up and down a few times, but in the end, she didn't tell Yu Xiaolian.
Letting her know now would only add to her worries.