No alteration is allowed 1. A will is a unilateral legal act, that is, a will is a legal act that can produce expected legal consequences based on the testator's unilateral expression of intention. 2. The testator must have full civil capacity. People with limited capacity and persons without civil capacity do not have testamentary capacity and cannot establish a will. 3. Agency cannot be used when establishing a will. The content of the will must be the true expression of the testator's will, and it should be made by the testator himself and cannot be represented by others. If a will is written on behalf of someone else, the will must be signed by the person himself and witnessed by two or more witnesses. 4. In an emergency, oral will can only be used, and more than two witnesses are required to be present. After the emergency situation is relieved, if the testator can make a will in written form or recording form, the oral will will therefore be invalid. 5. A will is an act that becomes legally effective when the testator dies. Because a will is a testamentary disposition of the property ownership after the death of the testator during his or her lifetime, and can be changed or revoked before death, the will must be effective upon the death of the testator. 6. If the testator does not actually die, but if the relevant legal conditions are met and the people's court declares his death upon the application of the relevant interested parties, the will will also become legally effective, and the interested parties can dispose of the property of the party to the will. If the testator reappears in a short period of time, the corresponding property can be returned to the testator; if the time is longer, such as more than two years and the property cannot be returned, the beneficiary should be responsible for the testator’s basic living conditions. Help is provided within the scope of benefit, but the legal obligor is not subject to this restriction.