The Tang dynasty can be used as a military guide, and the underworld can be used as a map of Lingbao.

As long as Tang learned the JN. Sect, he could go to Chang 'an's "Book" Yan Ruyu to make a military guide. Military symbol recognition can only identify weapons and armor. And it is below JN level. Equipment more advanced than military expertise is unrecognizable.

After learning the sect JN, the underworld can go to Chang 'an's "Book" Yan Ruyu to do Lingbao illustration, and can identify helmets, necklaces, belts and boots.

If you mean the reinforcing agent,

That needs a blank enhancer. Then right-click the enhancer. Datang can only add qi and blood attributes.

As for the blank enhancer, you can buy it in Xian Ling drugstore or NPC in Chang 'an.