Taking a look at the TL3 regions for each country shows the problem: the TL3 region for inner London covers one of the highest-earning city centres in the world, but excludes much of the area where its earners live.
In 2006-09 the region's GDP (excluding Inner Mongolia, which extends into the north-east, but is not part of its industrial heartland) grew faster than that of the country's other three main economic regions, in the east, centre and west.
For the geographically-challenged, Erdos sits in the southwestern part of Inner Mongolia near where Shaanxi province meets the autonomous region known as Ningxia.