How to clearly determine whether a property or non-property court fee must be paid

A property dispute differs from a non-property dispute in that it always has a price: if you filed a lawsuit to recover the value of property (an apartment, for example), it will be a property dispute, and the court fee is paid from the value of this property; if you filed a lawsuit to declare the contract invalid, it is a non-property dispute, because the contract as a document has no value.