This behavior violates the provisions of Article 45 (Order No.532 of the State Council today): if the amount of foreign exchange bought or sold privately, in disguised form, in reverse or illegally introduced, the foreign exchange administration authorities will give a warning, confiscate the illegal income and impose a fine of less than 30% of the illegal amount; If the circumstances are serious, a fine of not less than 30% but not more than the equivalent of the illegal amount may be imposed; If the case constitutes a crime, criminal responsibility shall be investigated for corruption.

So you should refer to the specific amount involved in this behavior. If the amount is large, the foreign exchange administration department and the public security organ can intervene.