The specific performance is as follows:
1. When a contract is concluded in a different place, because one party does not carry a seal with him, it cannot be stamped when concluding the contract, so one party stamps the contract with its own seal and brings it back to the other party for stamping, but the other party fails to stamp it or notify the other party for various reasons after returning to the unit;
2. It is not the legal representative or person in charge of the unit who signed the contract, but only the general employees. As stipulated in the terms of the contract, one party seals it, and the other party takes the contract back to the legal representative or person in charge for examination and approval and seals it. The legal representative or person in charge disagrees with the terms of the contract and refuses to seal it;
3. After one party seals, but before the other party seals, the trading conditions change, and he refuses to seal. In this case, according to the provisions of Article 32 of the Contract Law, combined with the provisions of Article 37 of the Contract Law, one party sealed the contract, but the other party did not seal it. One party fulfilled its main obligations and the other party accepted it, and the contract was established. Otherwise, the contract is not established. In case the contract is not established, if the sealed party thinks that the contract can be performed and has made necessary preparations for the performance of the contract, which has caused economic losses, then the sealed party may bring a lawsuit to the people's court, requesting the people's court to order the party that has not signed and sealed to bear the liability for contracting negligence.
The related problem is that when both parties negotiate and sign the agreement, one party seals it first, and then seals it. One party seals, some clauses are modified, and the other party has no written objection. How effective is the supplementary agreement? According to Article 1 of the Supreme People's Court (2002) MinertiziNo. 16 Civil Judgment [Summary of Judgment], it shall be deemed that the party who sealed it first agreed to the revised agreement, that is, the supplementary agreement shall be deemed valid.