Smuggling back to China and surrendering may be mitigated or exempted from punishment. This is because surrender is a legal circumstance that can reduce punishment and exempt punishment. Smuggling is a criminal case, so you can hire a lawyer.
Article 67 of the Criminal Law A person who voluntarily surrenders himself after committing a crime and truthfully confesses his crime is a person who surrenders himself. Criminals who surrender themselves may be given a lighter or mitigated punishment. Among them, if the crime is minor, the punishment may be exempted. If a criminal suspect, defendant or criminal serving a sentence who has taken compulsory measures truthfully confesses other crimes that have not been mastered by the judicial organs, he shall be deemed to have surrendered himself. Although the criminal suspect does not have the circumstances of surrender as stipulated in the preceding two paragraphs, he can be given a lighter punishment if he truthfully confesses his crime; By truthfully confessing one's crimes, particularly serious consequences are avoided and the punishment can be mitigated. Article 322 If the crime of crossing the border violates the border management laws and regulations, if the circumstances are serious, he shall be sentenced to fixed-term imprisonment of not more than one year, criminal detention or public surveillance, and shall also be fined; Whoever steals across the country (border) for the purpose of joining a terrorist organization, receiving terrorist training or carrying out terrorist activities shall be sentenced to fixed-term imprisonment of not less than one year but not more than three years and shall also be fined.