The length of service of social security and archives is different.

Legal analysis: if the length of service of social security is different from the length of service of archives, the length of service of archives shall prevail.

Legal basis: Regulations on the Implementation of the Labor Contract Law

Article 9 The starting time of continuous work 10 year stipulated in the second paragraph of Article 14 of the Labor Contract Law shall be calculated from the date when the employing unit recruits workers, including the working years before the implementation of the Labor Contract Law.

Article 10 If a laborer is assigned to work in a new employer for reasons other than his own, the working years of the laborer in the original employer shall be counted as the working years in the new employer. If the original employer has paid economic compensation to the employee, the new employer will not calculate the employee's working years in the original employer when dissolving or terminating the labor contract according to law.