In September 1820, at the age of 38, Mianning inherited the throne after his father the Jiaqing Emperor died suddenly of unknown causes, becoming the first Qing emperor who was the eldest legitimate son of his father.
Mianning inherited the throne after his father. This was at the age of 38. This was in September 1820. The Jiaqing Emperor died suddenly his father of unknown causes. These unknown causes was the eldest legitimate son of his father. His father was becoming the first Qing emperor.