The sea has been clever since childhood. "Nine-year-old man is full of Chinese meaning, and the weak crown is around." Nurhachi gave the secretary who lived in the inner court the task of "communicating with the Ming, Mongolian and Korean", drafted a proclamation and made a set of credentials. He "promised Fu Xuan" all orders and proclamations issued by the State of Jin that involved copying Chinese characters. Soon, Nurhachi ordered him to translate Ming Hui Dian, Su Shu, San lue and other books, all of which were praised as good.

In the third year of Tiancong (1629), the Qing Taizong began to set up a literature museum, which was divided into two offices. One is to translate the Chinese books of Dahai and Lin Gang, Su Ming, Gullmar Hun and Tobuqi; The other office was written by Kurgan, Wu Basheng, Chasuka, Qiuhu and Zhanba. Dahai is the general manager of the museum and has been engaged in museum work for a long time.

In the same year 10, Huang taiji led the army to levy the Ming Dynasty, defeated the armies of four Ming generals, including Man Gui, and arrived at the gates of Beijing. Huang taiji sent a letter to the sea to negotiate with the Ming court, who refused to negotiate. Huang taiji had to order Dahai to write two more letters, one outside Deshengmen and the other outside Andingmen, and then lead his teacher back to Shengjing.

In the fourth year of Tiancong (1630), Huang Taiji led an army to reconquer the Ming Dynasty and arrived at Shaheyi. Dahai gave an order in Chinese. After the capture of Yongping City, the sea boarded the city with a yellow flag in hand and recruited soldiers and civilians in Chinese. When the soldiers and civilians in the city heard his sincere declaration, many people knelt on the ground and shouted "Long live!" Abatai Baylor led the Ming generals Meng Qifang, Yang and Yang to see Huang Taiji. Huang taiji ordered the sea to comfort them in Chinese. After the soldiers and civilians of Santunying and Hanerzhuang surrendered, the Ming army attacked Santunying again. Huang taiji was afraid that the soldiers and civilians in Hanerzhuang would rebel, so he ordered the sea to appease and stabilize the people's hearts in Chinese. In the same year, Indahai was awarded a guerrilla position after translating Chinese books. In the fifth year of Tiancong (163 1), the sea was consecrated to Barker, and the Daling River City was confiscated from Huang Taiji. Zu Dashou, the company commander of the Ming Dynasty, was shaken by the encirclement of the post-8 Jin Army, but he was not prepared to surrender. The sea repeatedly attacked his policy in Chinese, pointed out the way out, and finally Zu Dashou surrendered. At the end of the year, with the participation of the sea, Hou Jin imitated the lighting system, set up a ceremony and concentrated on Huang Taiji.