"Although I'm not very certain..." Lu Zhao slowly began, the three of them perked up their ears and listened, "But judging from Little Jin's experience, these books are very likely to be the 'Imperial Decree,' or what is known as the 'Yin Yang Books.'
Chen Bing and Chen Xue exchanged glances, both somewhat puzzled, seeming not to understand this concept.
"Imperial Decree? Yin Yang Books?" Only Jin Jiuyao's expression tensed, as if he recalled something, "The kind that relies on layers to transmit information?"
Chen Xue asked, "What is the Imperial Decree, it sounds a bit familiar?"
Lu Zhao was about to explain when he noticed Jin Jiuyao seemed hesitant, so he said, "You seem eager to explain, you do it."
Jin Jiuyao chuckled: "Hehe, alright."
"Yin Yang Books, well, it's the content written in the Yang Book that can manifest in the Yin Book."