Wikipedia
Jinyiwei
The Jinyiwei was the imperial military secret police that served the emperors of the Ming dynasty in China. The Jinyiwei was founded by the Hongwu Emperor in 1368 to serve as his personal bodyguards and it developed into a military organisation the following year. They were authorised to overrule judicial proceedings in prosecutions, with full autonomy granted in arresting, interrogating and punishing anyone, including nobles and the emperor's relatives.
The Jinyiwei were also tasked with collecting military intelligence on the enemy and participated in battle planning stages. A Jinyiwei guard donned a distinctive golden-yellow uniform, with a tablet (pictured) worn on his torso, and carried a special blade weapon.