Cost of living in San Luis Potosí (Mexico) is 24% cheaper than in Zhenjiang (China)
This comparison is lacking data. It provides a decent comparison, but it is not yet reliable. It is based on 166 prices entered by 9 different people.
For example, to keep the same standard of living that would require 元9,400 in Zhenjiang you would need to make just about 元7,178 (Mex$ 21,264) in San Luis Potosí.