Due to the shrinking of its once-powerful industrial sector and decline of its economic growth, the region is often referred to as the Rust Belt in China.[1] As the result, a campaign named Northeast Area Revitalization Plan has been launched by the State Council of the People's Republic of China, in which five prefecture-level cities of eastern Inner Mongolia, namely Xilin Gol, Chifeng, Tongliao, Hinggan, and Hulunbuir, are also formally defined as regions of the Northeast.[2]