C282 Arrival of aircraft

was very clear on this point.

Tang Dynasty needed time to become strong.

Fan Yu was right, it was hard to digest a strong power when it was weak.

If the Tang Dynasty was weak and the Hei Shi was strong, they could release the Martial Emperor. Other people might not even be able to release the Martial Emperor, and it would be hard to say if even Liu Yuan could release the others as well