Ye Zhen remembered Tu Fangye, also because of the Sect Forbidden Land.
That day, by the edge of the Sect Forbidden Land with Fairy Caiyi, Ye Zhen heard an unusual sound and felt that the Sect Forbidden Land might really be hiding some great secret.
After returning, Ye Zhen subconsciously inquired about the Sect Forbidden Land from various sources.
The only people Ye Zhen could ask were the Outer Disciples, and this group was simply too low-level to uncover any useful information.
Many Outer Disciples, let alone give Ye Zhen any useful information, most had never even heard of the 'Sect Forbidden Land'; it was only Golden Yuanbao, who had mingled in the sect for a long time, who knew slightly more and was barely aware of the existence of this Sect Forbidden Land.
As for the fact that the Sect Forbidden Land was the site of the fallen True Disciple Tu Fangye, no one knew at all, not even Ye Zhen.