The Ouyang family had studied the miraculous characters on the ancient scroll for several eras without making any headway, which was why they finally decided to sell it.
Emperor Jinghong was able to recognize these characters simply because he had spent his entire life scouring various ancient ruins; his extensive exposure naturally gave him an understanding of them.
Even so, Emperor Jinghong's knowledge was limited to a basic understanding rather than true fluency.
Chapter 1554