It is illegal for employees of companies and enterprises to engage in private work. If they infringe the interests of their own units, they may even constitute a crime. According to the relevant provisions of Chinese laws, whoever infringes on business secrets, if the circumstances are serious, shall be sentenced to fixed-term imprisonment of not more than three years and shall also or only be fined. If the circumstances are especially serious, he shall be sentenced to fixed-term imprisonment of not less than three years but not more than ten years and shall also be fined.