Cost of living in Essen (Germany) is 60% more expensive than in Zhenjiang (China)
This comparison is lacking data. It provides a decent comparison, but it is not yet reliable. It is based on 115 prices entered by 7 different people.
For example, you would need at least 元14,038 (€1,748) in Essen to maintain the same standard of living that you can have with 元8,800 in Zhenjiang.