宣徳帝
Formal tributary relations with China began in 1372, and in 1427, the Xuande Emperor famously bestowed upon Hashi, King of Ryukyu, the honorary family name Shō (Shang), along with a lacquer tablet inscribed with the characters for Chūzan, and a number of other lavish gifts, including lacquerwares and formal court robes. This famous lacquer tablet was installed over the entrance to Shuri Castle, where it remained until the mid-20th century.