Onsite training: if the demand side deems it necessary, the supplier shall be responsible for onsite training of technical operation and maintenance personnel at the location of the demand side, and the recommendation of the training plan and the supply of the training materials should be carried out one month prior to the training accepted by the demand side. The personnel shall be able to skillfully operate the equipment, have the knowledge on the structure, operating principle, technical performance indexes,installation, maintenance and servicing of the equipment, and eliminate common problems after training.The operators must pass the examination prior to appointment.