1.  1.  If any quality problems occur within guarantee period, shall provide 24 hours free maintenance service.
2.  2. Once the 2-year warranty period expires,  shall provide a favorable price for maintenance service.
3.  3. Cost for after-sales technical support.
   Shall send engineers for on sight support for installation and maintenance guidance, while the client should bear all the expenses incurred for the after-sales technical service.