According to the provisions of the Criminal Law of People's Republic of China (PRC), anyone who knowingly cohabites with or marries a serviceman shall be sentenced to fixed-term imprisonment of not more than three years or criminal detention. Whoever rapes a soldier's wife by taking advantage of his power shall be convicted and punished in accordance with the provisions of Article 236 of this Law.
If Fan Xiaohui's husband's affair is true, he may face disciplinary action, criminal punishment and divorce compensation. The derailment of military married soldiers is also a major fault, but it is not a breach of military marriage. Either spouse has the right to bring a lawsuit to the court.
If you need more detailed information, it is recommended that you consult local legal experts or lawyers to obtain more accurate and detailed information.