Is it illegal to open the property computer to print things privately?

It is illegal to open the property computer to print things without authorization. According to the relevant information found, he is found guilty of violating the privacy of others. If the circumstances are serious, he shall be sentenced to fixed-term imprisonment of not more than three years or criminal detention. If the circumstances are particularly serious, he shall be sentenced to fixed-term imprisonment of not less than three years but not more than seven years and shall also be fined.