2. In addition to the requirement of writing a will as an agent, there should be two or more people who have no interest in the will. A testator may revoke or change his estate.
3. Oral wills can only be used in dangerous situations, and at the same time, more than two unrelated people are needed as witnesses.
4. Public debate sharpens the will. Changes to notarized wills shall also be made in the form of notarization, and other forms shall not conflict with their validity.