He Ao's gaze swept over the woman without leaving a trace before returning to the bookshelves.
The woman's eyes were covered by a light veil, and she did not direct her speech towards He Ao, which made it very likely that she was already blind.
He Ao was not surprised by the woman's appearance. In fact, he had known that someone must have been quietly observing him from behind the scenes ever since the secret passage entrance had slammed shut as soon as he entered it.
After all, this underground library was guarded so meticulously that it was obviously an important area, and implementing remote surveillance would not be difficult.
Simply installing a monitoring device on the innermost door would suffice.
When He Ao had been searching for information with his bracelet, he was actually also checking the network.
Where the network extended, modern technology could reach.
