Compliance with laws- the bottom line  of integrity 

Company advantage
Sales the machine and invoiced to the customer ,at the same time give you post-sale legal protection.
Purchase parts and request an invoice, formal purchase channels, we can control the quality.
For each employee to sign labor contracts and pay the insurance.

Some of other company
If a company does not comply with the law,how does it have the credit?
No invoice,  ignored problem of machine after sale.
Purchase through informal channels, cheap steel, finding parts with no invoice.
Don't pay insurance for employees.