Do diesel versions need to add original urea?

Whoever tells you that is just trying to fool you. 😄

As long as it's a branded urea, it's all good. 😄

As long as it's a major brand of urea that meets the AUS32 standard, it's fine.

No need, the fuel sold at Sinopec and PetroChina stations is good enough! To be honest, the Beijing BJ40 is a rugged vehicle. Even if you give it the best care, when the time comes, it'll still break down. [I want to be alone]