Can the housing maintenance fund be used to maintain the landscape of the community? Is it reasonable for our community to use the maintenance fund to maintain the landscape pool in the community?

Strictly speaking, it is impossible. This is super-purpose use.

Housing maintenance funds include housing public facilities special funds and housing maintenance funds. The special fund for housing public facilities is referred to as the special fund, which is used for projects such as the renovation of common parts of property and public facilities and equipment, and shall not be used for other purposes. Special funds to implement the principle of "money with the house". When the house is transferred, the remaining funds in the account are also transferred to the new owner of the house.