First, what I don't understand about your question is: Since I can't read, how can I sign?

Second, if the 60-year-old illiterate old man only knows two or three words of his name; After he understood and agreed to the full text of the contract, he signed it to confirm that the contract thus signed was valid.

Third, if the 60-year-old man can't read, others have the right to sign the contract, so it is more appropriate to ask others to sign it.

Fourth, if it is really necessary for an elderly person over 60 to sign a contract, and it is not convenient for the elderly to sign a contract because of illiteracy, the elderly can entrust others to sign the contract by recording the power of attorney orally, by audio or video recording.

Fifth, to sum up, my answer is that it should also be effective for 60-year-old illiterates to sign contracts.