To write a will, you must first state the information such as the testator's name, age and ID number. Then write: I will make a will here and deal with some of my property as follows: 1. I voluntarily leave the following property owned by me to XXX, and I will write down the details of the property below, such as a TV set or a refrigerator. 2. I voluntarily leave the following property that belongs to me to another person: I must also specify the details of the property, such as a car. III. This will entrusts XXX as the executor. Finally, the testator signs. At this point, a simple self-written will is completed, but it is not necessarily valid after it is written. The following conditions must be met: 1. The testator must have full capacity for civil conduct. 2. The will must be the true meaning of the testator. Wills made by coercion and fraud, as well as tampered or forged wills, are invalid. 3. The contents of the will shall not violate the law or harm the interests of the state or the collective. 4. The will should reserve the necessary share of the inheritance for the heirs who lack the ability to work and have no source of income. 5. The property disposed of in the will can only be the property owned by individuals. Property owned by the state, the collective or others shall not be disposed of.