Legal analysis: Reasonable. Although there is no clear legal basis for the developer to charge a name change fee, considering the developer's costs and expected loss of profits, the original pre-purchasers and new home buyers can negotiate with the developer for a more appropriate name change fee and determine it in the form of a contract. Avoid future disputes.

Legal basis: Article 490 of the Civil Code: Where the parties conclude a contract in the form of a contract, the contract is established when both parties sign, seal or fingerprint. Before signing, sealing or fingerprinting, one party has performed its main obligations and the contract is established when the other party accepts it. Laws and administrative regulations stipulate or the parties agree that a contract should be concluded in written form. If the parties do not use written form but one party has performed its main obligations and the other party accepts it, the contract is established.