According to international practice related, the warranty period is 12 months after the installation and commissioning finished. For fasting the installation and commissioning, after the machinery arriving in the buyers’ port, it should be finished all the preparation for the installation and commissioning of the production line. If 60 days passed, the preparation for the installation and commissioning of the production line not finished, the warranty period will begin to be calculated. If it is passed more than 1 year due to the buyers’ problem.The warranty time should be discussed again.The damage from the incorrect operation is out of the warranty scope.