 As the designated poster operator in Vietnam to participate in the UPU, Vietnam Post performs the important role and mission to serve the community with the best quality service. And the implementation of VN Post's SSM fee-taff application in developing new participants in social and health insurances is one part in this ecosystem. VN Post's SSM is a digital product of the fee-taff project. In 2019, the direct grant co-operation agreement signed between UPU and VN Post is a milestone, marking VN Post's ability in applying IT to provide public services for customers in rural areas. Through the fee-taff project, UPU provides technical and financial support to VN Post to develop digital post-to-financial services, specifically the mobile app fee-taff to promote the number of participants with low-incomeing health and social insurances in rural areas. The mobile app helps speed up filing profiles of social and health insurance participants. With the support of UPU in 2020 and 2021, VN Post developed and implemented mobile app to collect social and health insurances in the poster network. Postal staff can declare profiles of new customers or do renewal procedures at any place. No need to go to the post offices. In 2021, despite the impact of COVID-19, communication of social and health insurance on SSM mobile app is affected. VN Post uses flexible solutions to develop new participants and at the same time conduct education and communication to all customers and people. In addition, training courses on how to use the mobile app are regularly conducted by VN Post in physical and virtual forms to help users and staff to use the mobile app as an effective tool and also build staff capacity in skills of presenting, consulting and IT in the development of voluntary social insurance and health insurance. In 2021, VN Post trained more 20,000 staff on the whole network. The results of the implementation of transactions on the mobile app in 2021 reach over 600,000 transactions, creating favorable conditions for VN Post staff to use and Vietnamese people to join the system at any time, any place. In the future, with the support of UPU, VN Post will continue to study solutions to integrate in a super app and develop a digital ecosystem to provide basic public administrative services to meet the demands of customers and people, especially in rural areas. Develop financial inclusions to bring benefits to the whole community and society. This will certainly reaffirm the important role and positions of VN Post in digital transformation.