According to the inheritance law, a self-made will is written by the testator, signed and marked with the year, month and day. No requirement, but it's safer to fingerprint. Handwriting and handwriting may change at different times, but fingerprints will not.

inheritance act

Seventeenth notarized wills shall be handled by the testator through the notary office.

A self-made will is written and signed by the testator, indicating the year, month and day.

A will that entrusts others to write on behalf of others shall be witnessed by two or more witnesses, and one of them shall write on behalf of others, indicating the year, month and day, and shall be signed by the agent, other witnesses and the testator.

If a will is made by recording, there shall be two or more witnesses present.

A testator may make an oral will in an emergency. An oral will shall be witnessed by two or more witnesses. After the emergency is lifted, if the testator can make a will in written or recorded form, the oral will made is invalid.