2. If no labor contract is signed, the factory may be required to pay double wages from the second month of employment;
3. "Complaining against black factories" is a vague concept. If this factory violates the law, you can complain to the labor department or directly apply for labor arbitration;
One more thing: is that the questioner above? What do you mean "the factory didn't apply for labor arbitration"? The manufacturer doesn't think that you have infringed his interests, and certainly won't apply for arbitration. You think that the manufacturer has violated your interests and you need to file arbitration yourself.