Had he skipped fewer classes when he was a kid, he wouldn't have had a hard time distinguishing riding skill from Horse Riding.
Even though he didn't know why his brother-in-law suddenly decided to take part in the Imperial Examination, he still patiently explained, "You're mistaken, Horse Riding isn't about riding horses, but about driving carriages. There are Five Imperial, which are Ming and Luan, Chasing Water Curves, passing the King's table, Dancing Crossroads, and Chasing left..."
After deciding to take the Imperial Examination, Li Nuo had done his homework.
He naturally knew what Song Yu was talking about.
To put it plainly, Horse Riding was akin to Daxia's driving license.
The so-called Five Imperial were five subjects,
That is, what Song Yu mentioned: Ming and Luan, Chasing Water Curves, passing the King's table, Dancing Crossroads, Chasing left.