Physical constitution can be improved through cultivation, but it doesn't help much with mental strength; you can only improve it by adding points.

However, obtaining a secret manual to enhance mental strength would be of great help to him.

As for spirit stones?

It wasn't as important to him as he imagined.

After all, he was already at the late stage of Gang Jin, and even if he cultivated internal energy, it would not increase his strength by the slightest.

Upon hearing Gao Yan's request, Zhuge Yong's face darkened, and he said somewhat helplessly, "Young friend, to be honest, our lineage's feng shui secrets are not only never passed on to outsiders, but also only to men, not women. Could you change your terms?"

"Then there's nothing we can do!"

Gao Yan shook his head: "I don't need anything else, I just want to see that so-called feng shui manual!"

"this?"

Zhuge Yong's expression became increasingly troubled.

At this moment, Gao Yan continued, "How about this, Master Zhuge, if you lend me your manual for an hour, I'll give you a spirit stone in return?"

Hearing that Gao Yan would only watch for an hour, Zhuge Yong was quite tempted. Their lineage's feng shui secrets were extremely profound. He had studied them for decades, but he dared not say that he had completely mastered them.

Even if the other party is a genius, he doesn't believe that they can decipher the secrets of feng shui in an hour.

"Alright, I promise you!"

"Alright, let's set a time, one hand will hand over the manual, the other hand will hand over the goods!"

A smile also appeared on Gao Yan's face.

"No need for that, I carry the manual with me at all times!"

As he spoke, Zhuge Yong reached into his robes, took out an oil paper package, and opened it to reveal a three-inch-thick ancient book.

The title of the book is blurred, but three characters can still be vaguely discerned—Feng Shui Classic!

Gao Yan didn't hesitate and handed a spirit stone to Zhuge Yong, while he picked up the Feng Shui manual and began to read it.

Upon opening the book, Gao Yan immediately understood why Zhuge Yong was willing to let him read it for an hour. The book was written entirely in classical Chinese, and contained many obscure and difficult-to-understand words.

Unless you're a professional feng shui master, you simply can't understand what these words mean!