Nuopanto (????, Nanai-Banda, a Sogdian from Bukhara) as an emissary to the Göktürk chieftain Tumen, in an attempt to establish a commercial relationship. In 546, Tumen paid tribute to the Western Wei state. Tumen later put down a revolt of the Tiele tribes, accepting the surrender of over 50,000 households against the Rouran Khaganate, their overlords.

Following this, Tumen felt entitled to request of the Rouran a princess