For those who break the contract after signing the offer, the other company may have some new personnel adjustments. For example, those who left before will not leave or have a better successor choice. But for a formal company, once an offer is made, it will bear certain relevant legal responsibilities. Therefore, for enterprises that have signed an offer, if there is a breach of contract, they can go to labor arbitration to claim individual rights. Of course there is no way. Before that, you should fully communicate with the other company.