Lin Yun had become aware of the surveillance on the 7th day. He had been overdrafting his mind power by using Berserk Transformation for ten hours straight. But his soul became a lot purer after he woke up. His mind power also grew in strength, and his perception naturally grew sharper.
But even though Lin Yun noticed the surveillance, he ignored it. Letting outsiders enter that sealed space was very dangerous in itself. There was nothing wrong with their host being cautious and monitoring them, so Lin Yun didn't mind. In any case, the important parts of his research couldn't be monitored.
What's more, the mysteries and data researched would ultimately be copied for the Starry Sky College, so it didn't really matter...
Lin Yun didn't care about that matter, but he started thinking about other things. In ten days, he had comprehended over fifty truth runes.