He still decided to leave. As for Wu Yu, he was fighting to gather 50 Demon Injunction Orders. He couldn't possibly protect Huang Yanwu. 

In the Sixth Hunting Ground, their encounter was just a chance acquaintance. Wu Yu had given him more time to live, while he had given Wu Yu a stone with a secret hidden behind it. 

The secret of the stone was a knot in Huang Yanwu's heart that he wished he could eventually untie. 

Countless times, he wondered what would have happened if he had not backed away and instead explored the secret of the white egg. What could he possibly get? What would he become? 

However, life was just like this. A small decision could affect one's entire life. There's no medicine for regrets in the world, and time wouldn't flow backwards. 

After handing the source of this secret to Wu Yu, Huang Yanwu left in a light-hearted manner. As for Wu Yu, he felt something weighing on him and vaguely felt a little frustrated.  

It wasn't because of the stone, but his weakness up till this point. He couldn't help a person he wished to help dearly and could only see him off. This made him angry with himself. It was especially so as it had been a long time since he returned to Shushan. The more time passed, the more he felt the frustration in his heart would devour...