It seemed that while everyone at the scene was repeatedly disagreeing with Xiao Yebai’s viewpoint, only Gu Nuan stood by her husband’s side and suddenly said, "No, he’s right."

"Sister-in-law?" The others were surprised, thinking that this couple really sang the same tune; even someone as smart as Gu Nuan was following Xiao Yebai’s arrogant words.

Gu Nuan said, "First look at what kind of keys these are."

"Aren’t they just ordinary keys?" Zang Xiaolian murmured, picking up one and placing it under the light for everyone to see more clearly.

The keys had very noticeable notches, nothing else.

"I think the era when this key was made shouldn’t be too distant," Gu Nuan said.

The others couldn’t even think in this direction, all stunned, as if they were listening to a cryptic message. Subsequently, Wei Changqing and Zhang Sanfeng reacted first.

The two of them examined the two keys again and confirmed, "It shouldn’t be keys that have been handed down for more than a hundred years."

"What does that have to do with anything?" Zang Xiaolian asked.

"According to the security measures for valuable items nowadays, relying only on keys for defense is too simplistic, right? If the era when this key was made is more recent, and if security measures like passwords have already been invented—" Wei Changqing said.

The others present suddenly came to their senses. It seemed that the treasure required something else besides the key to unlock it, something like a password. If we proceed with this logic, the reason the person with the black hat kidnapped them as children was for this.

"Biotechnology? Was there already biotechnology in those days?" Zang Xiaolian sighed incredulously.

"This is unknown. Maybe it’s not any biotechnology, just that there happened to be a password or something that corresponds with us kids," Wei Changqing speculated.

Gu Nuan, however, looked at her husband’s face.

Xiao Yebai flashed her a bright smile: "My wife is the smartest, indeed. Only a family heir can meet with the treasure’s agent. Only those agents hold the passwords. With the key and the password, you can obtain that thing."

Family heir? Everyone questioned again.

The heir of the Zhang Family isn’t Zhang Sanfeng but Zhang Yingxi.

Xiao Yebai turned to Zhang Sanfeng and said, "The heir recognized by the agents is not necessarily the one appointed by the elder family members."

Could it be that this is the source of Zhang Yingxi’s long-standing heartache? Even though he was appointed by the family elders, the agent never acknowledged him but recognized Zhang Sanfeng as the successor to the Zhang Family ancestor.

"But, Second Brother—" Zhan Dapeng turned back to the original question, "Why hasn’t my family mentioned the existence of this key? Also, the Zhong Family, why does Duke Philips have a key?"

"To figure this out, I’ve been to your home and also to Old Six’s place, trying to explore."

Zhan Dapeng and Wei Changqing were simultaneously shocked: "When did you come to our homes?"

Without a word?

"If I told you, wouldn’t it be alerting the enemy?" Xiao Yebai said, "Of course, the fewer people know about this, the better. Besides, things hadn’t been confirmed at the time."

"What exactly did you find out?" Wei Changqing asked, suddenly feeling a deep sense of guilt. Compared to his own downfall over the years, Xiao Yebai had exerted so much effort for his brothers. He used to think this second brother was just a playboy with a smart mouth, but in fact, he was the complete opposite.

Xiao Yebai raised his eyebrows at Old Six, who looked a bit dejected, and said, "There’s something you need to do, your family’s key hasn’t been lost."