Emperor Wen of Sui
Also called: Yang Jian
Founder of the Sui (r. 581–604), who took over from the Northern Zhou, reunified China by conquering the southern Chen in 589 and first introduced the civil service examinations
From a Northern Zhou military family, he gained power as an imperial in-law when his daughter became empress of Emperor Xuan of Northern Zhou. In 581 he took the throne from the child Emperor Jing and founded the Sui, and in 589 sent forces under his son Yang Guang (later Emperor Yang) to destroy the Chen. The Kaihuang code, the Three Departments and Six Ministries and the examinations laid the framework of the unified empire, and his frugality filled the granaries. His Goguryeo campaign of 598 failed, and he died at the Renshou Palace in 604 — some accounts say at the hands of Emperor Yang.