1. Oral agreement: reach an oral agreement with the tenant to clarify the relevant terms and conditions of the lease. In this process, you can record or video as a backup.

2. Seal instead of signature: use seal instead of signature. The tenant can make a personal seal and stamp it at the corresponding position to express his consent to the contract.

3. Signature of legal representative: If the lessee is underage or unable to sign the contract for any reason, he may entrust his legal representative to sign the contract on his behalf.

4. Oral witness: In the process of concluding the contract, one or more third parties are invited to be present as witnesses to record the contents of the contract terms and the agreement between the two parties.

Either way, in order to ensure the rights and interests of both parties, please be sure to clearly define their respective rights and responsibilities before signing the contract. It is also recommended to consult a professional legal adviser to ensure the validity of the contract.