Cost of living in Koblenz (Germany) is 70% 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 138 prices entered by 15 different people.
For example, you would need at least 元18,700 (€2,329) in Koblenz to maintain the same standard of living that you can have with 元11,000 in Zhengzhou.