The roots of the current form of social insurance in the Islamic Republic of Iran go back to 1930, the time of constructing the railway, and which was established under the title of Workers' Provident Fund.

Thereafter, the structure of social security services was organized in 1975 in the form of the Social Security Organization  (SSO).

Currently, the SSO as the largest social insurance body, medical network and pension fund in the region covers around 40 million persons, which is equal to 50% of total population of the country.

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China has the largest social insurance system in the world covering nearly 1.4 billion people and includes old-age, medical, work injury, maternity and unemployment insurance schemes. There are more than 8,000 social insurance agencies at and above the county level in China, with nearly 180,000 staff, undertaking 1.99 billion individual service transactions annually. Due to historical reasons, many branch-based operational agencies follow different management and service standards, and do not even have a unified name. This practice is inefficient and errors easily occur.