[3][4] By the time of their king's arrival to Nanjing, "Boni" had had a long history of contact with China, having sent envoys during the Northern Song dynasty.

[3][5] In the third year of the Hongwu reign, Ming dynasty (1370), the emperor Zhu Yuanzhang dispatched imperial censor Zhang Jingzhi and Fujian official Shen Zhi to Boni on a diplomatic mission.

Thus he arrived in Fujian province by sea, along with his wife, sons and several other relatives, and they received a warm welcome from the local officials sent by the central government.

[3][4] In August 1408, Maharaja Karna and his companions reached the Ming Empire's capital Nanjing, to attend the imperial court.

The Yongle Emperor suspended court for three days, dispatched officials to mourn for the King, and conferred the posthumous title of "Deferent" on him.

After the Boni ruler's death, he was buried outside Andemen in Shizigang, which was in the southern part of Nanjing, according to the traditional burial customs of Chinese vassal.

The sister of the Brunei Sultan Hassanal Bolkiah, known as Princess Masnah, visited the tomb of the King and attended the opening ceremony of the newly built "China-Brunei Friendship Hall" in 2006.

Stone sculptures of generals, tigers, goats, horses and grooms are on either side of the spirit way,[9] with very exotic touches in the carving.