50-year-old ordinary workers, in addition to do some manual labor, it can be done?

In the big cities like Beijing, the 50-year-old ordinary migrant workers, in addition to do some manual labor, you can do?

Please help recommended for 50-year-old farmer in his early work, in addition to do some manual labor, but also what kind of place, easier to do certain work? Thank you for the!

If you would not mind low wages can go to the factory when those smaller guards,

this, age too, do the security?