Do small towns in Shanghai count two years as one year of social security?

Yes, when calculating the length of service in Shanghai, there are social security in small towns and social security in big towns.

They are called urban insurance and urban insurance respectively. If you convert urban insurance into urban insurance, two years can be counted as one year.

Legal basis:

Trial Measures of Shanghai Municipality on Basic Medical Insurance for Urban Residents

Fifteenth insured persons belong to the family members who enjoy the minimum living guarantee for urban residents in this Municipality, and the individual contributions can be appropriately reduced or exempted, and the reduction or exemption shall be borne by special funds.

Designated medical institutions and individuals who violate the provisions of these measures or cause losses to residents' medical insurance funds by other unfair means shall be ordered by the Municipal Medical Insurance Bureau to make corrections within a time limit, recover the paid related medical expenses and deal with them in accordance with the relevant provisions of the state and this Municipality.

Sixteenth of the designated medical institutions with serious violations, the Municipal Medical Insurance Bureau may suspend its settlement relationship. If a crime is constituted, criminal responsibility shall be investigated according to law. If a crime is constituted, criminal responsibility shall be investigated according to law.