I need to go to the second-hand house online sign, and I need to provide my ID card and my signature to handle the second-hand house online sign. The second-hand house that has been sold will also sign the online power of attorney when signing the sales contract, so I need to go to the scene.

Legal basis:

A contract established according to law in Article 52 of the Civil Code of the People's Republic of China shall come into effect upon its establishment, unless otherwise stipulated by law or agreed by the parties.