Paying the maintenance fund is necessary and legal. Mainly used for maintenance work such as residential buildings and roads.
However, in the early stages of a community, maintenance funds are generally managed by the housing authority, and the application procedures are cumbersome. After the community owners' committee is established, the public maintenance fund should be transferred to the owners' committee for custody, and it should exercise management power. Moreover, the money follows the house, even if the owner of the house changes, this will not change. Naturally, there is no return.
So, it is puzzling that your area is only responsible for 5 years.