According to the situation you described, you can choose to make a valid will according to law and leave your premarital property to your parents. How to do it depends on your wishes and actual situation.
legal ground
Inheritance law:
Article 16 A citizen may make a will to dispose of his personal property in accordance with the provisions of this Law, and may designate an executor.
Citizens can make a will and hand over their personal property to one or several legal heirs for inheritance.
Citizens can make a will to give personal property to people other than the state, the collective or the legal heir.
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.
Article 18 The following persons cannot be witnesses to the will:
(a) a person with no capacity or with limited capacity;
(2) Heirs and legatees;
(3) People who have an interest in the heirs and legatees.