Legal basis: Article 397 of the Civil Law of People's Republic of China (PRC) is mortgaged by a building, and the right to use the construction land within the occupied area of the building shall be mortgaged together. Where the right to use construction land is mortgaged, the buildings on the land shall be mortgaged together. If the mortgagor fails to jointly mortgage in accordance with the provisions of the preceding paragraph, the mortgaged property shall be regarded as joint mortgage.