Legal analysis: No, there are many types of wills in China, and each type has corresponding formal requirements. Because the heir's signature certificate is low, there is no need for the heir to sign the will.

Legal basis: Civil Code of People's Republic of China (PRC).

Article 123 After the beginning of inheritance, it shall be handled according to legal inheritance; If there is a will, it shall be inherited or bequeathed according to the will; If there is a legacy support agreement, it shall be handled in accordance with the agreement.

Article 134 A self-made will shall be signed by the testator and marked with the year, month and day.

Article 135 A will written by an agent shall be witnessed by two or more witnesses, one of whom shall write on behalf of the testator, agent and other witnesses, and shall be signed by the testator, agent and other witnesses, indicating the year, month and day.

Article 136 A printed will shall be witnessed by two or more witnesses. The testator and the witness shall sign on each page of the will and indicate the year, month and day.

Article 137 If a will is made in the form of audio and video recording, two or more witnesses shall be present to witness it. The testator and the witness shall record their names or portraits, as well as the year, month and day by audio and video recording.