渤海國
(?
818年～
830年)
大仁秀是渤海國第十代君主，大明忠之從兄，大祚榮之弟大野勃4世孫。在位期間818年至830年，年號為建興。
大仁秀兼併了靺鞨鐵利、安車骨、拂涅、號室等部，擊敗了黑水靺鞨，渤海國達到極盛。在位期間，曾二十次遣使到唐朝長安，所謂海東盛國主要就是指的時期。830年去世，謚號宣王。
Daren show is the 10th generation of the Bohai Kingdom monarch, the great Ming-Zhong from the brother, big brother Ono Bo Rong Zuo 4 generation descendant. During the reign of 818 to 830 years, the era name for the Lite. Daren show merged Mohe iron interest, security vehicles bone, brush Nirvana, Ministry of room numbers, beat the Blackwater Mohe, Bohai country prospered. During the reign of the Tang Dynasty had 20 times sent envoys to Chang'an, the so-called Dongsheng China Sea is mainly refers to the period. 830 died, posthumous title of King Xuan.