Illegal demolition and illegal demolition? How should the injured party defend its rights?

According to the second paragraph of Article 24 of China's Regulations on Expropriation and Compensation of Houses on State-owned Land: "Before making a decision on house expropriation, the people's governments at the city and county levels shall organize relevant departments to investigate, identify and deal with unregistered buildings within the scope of expropriation according to law. Compensation should be given to temporary buildings that have been recognized as legal buildings and have not exceeded the approved period; No compensation will be given to illegal buildings and temporary buildings that exceed the approved period. " Therefore, in the process of demolition, the demolition person does not need to make demolition compensation for illegal buildings. However, we can't think that there is no compensation problem in the process of demolishing illegal buildings. If the materials used in illegal buildings have independent value, the demolisher needs to fulfill the obligation of proper disposal and preservation, so it is necessary to distinguish between illegal buildings and materials used in buildings during demolition. Because some materials used in illegal buildings can exist independently, illegal builders enjoy legal property rights to the materials used in illegal buildings.