Legal analysis: signature, seal, etc. Are all effective signature methods. If there is no special agreement between the two parties to the contract, or there is no special emphasis or requirement according to the nature of the contract and trading habits, signature and seal can replace signature.

Legal basis: Article 7 of the Negotiable Instruments Law of People's Republic of China (PRC) is signed, sealed or signed and sealed. The signature of the legal person or other organization that uses the bill shall be the signature of the legal person or other organization plus the signature of its legal representative or its authorized agent. The signature on a bill of exchange shall be the real name of the party concerned.