Generally speaking, there are two kinds of fund payment, namely program payment and manual payment. For the return fund, those who do not enjoy the treatment but show normal participation may be caused by the following reasons. First of all, there may be a fault or error in the system, which leads to inaccurate information returned. Secondly, it may be that you filled in the application materials incorrectly, resulting in the information not meeting the requirements, and thus unable to enjoy the treatment. Finally, it may be because of policy adjustment and other factors that the relevant regulations have changed, which makes some people no longer enjoy this treatment. Therefore, it is recommended that you consult the local social security department or professionals.