Your focus is whether you can win the sublease lawsuit. Those are minor issues. Legally speaking, first of all, whether you can sublease or not is stipulated in the contract. If it is natural, there is no problem. If it is not, then you have to have evidence to prove whether they have established implied recognition. According to Article 16 of the Supreme Court's Interpretation of the Supreme People's Court on Several Issues Concerning the Specific Application of Laws in the Trial of Disputes over Urban Housing Lease Contracts, "If the lessor knows or should know that the lessee sublets, but has not raised any objection within six months, the people's court will not support it if it requests to terminate the contract or finds the sublet contract invalid on the grounds that the lessee has not agreed." This is the only way for you to recover. Take evidence quickly.