Mr Hassan,
You are working in China without a Z visa or working permit. How do you handle it? It is not permited to work in China without a Z visa. To obtain a Z visa, these documents are usually needed:
1. Your original passport, which must have at least 6 months vality left and enough blank visa pages
2. A duly signed application form with a passport photo affixed
3. An visa notification from an authorized relevant Chinese organization
4. Your physical examination form