It mostly covered territory which is now in Inner Mongolia .
Liaobei ( Wade - Giles : Liaopei ) also known as Liaopeh was a province in Manchuria , in what is now the People 's Republic of China .
Liaobei mostly covered territory which is now in Inner Mongolia .
Liaobei ( Wade - Giles : Liaopei ) also known as Liaopeh was a province in Manchuria , in what is now the People 's Republic of China .