At that time, the reason given in the passport was to travel, but it was actually to work abroad. Will it be illegal if it is discovered by the Public Security Bureau?

The agent said that when you apply for a passport, you only need to fill out the travel form. That's for the public security department to approve it faster and get the passport earlier. If you have a formal legal visa abroad and the labor service is formal, then there is no problem. It is impossible to pursue any responsibility. Because our country has no special tourist passport and official passport. As long as the visa is legal and the labor service abroad is legal, there is no problem. Not illegal.