Legal analysis: Yes, within 24 hours after the first online signing, you can apply online to cancel the signing, and re-sign the contract after mutual agreement. If the contract has been put on record and it is necessary to change the relevant clauses other than the core contents of the contract through negotiation between the buyer and the seller, the development enterprise may read and revise the printed electronic contract again. After more than 3 working days, the Buyer and the Seller reach an agreement through consultation, and apply to the real estate transaction management department for filing the contract and contract changes, and go through relevant change procedures.

Legal basis: Civil Code of People's Republic of China (PRC).

Article 543 The parties may modify the contract through consultation.

Article 544 Where the parties have not clearly agreed on the contents of the modification contract, it is presumed that it has not been modified.