C209 interchange

Ming Zhan had ascended to the throne of the Da Yan, and was known as Yan Zhanzheng Emperor.

Yun Chen had ascended to the throne of the Da Yun, and was called long term emperor.

Three months after they ascended the throne, the emperor and emperor agreed to meet within the borders of the Da Yun. Together, they signed the letter of credence of eternal peace between the two powers