Cost of living in Koblenz (Germany) is 59% more expensive than in Zhengzhou (China)
WARNING! This comparison is based on only a few data points. At this point it is only a guess. It is based on 80 prices entered by 14 different people.
For example, you would need at least 元19,132 (€2,447) in Koblenz to maintain the same standard of living that you can have with 元12,000 in Zhengzhou.