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CHZ solar led street lighting system factory Customer Satisfaction is of central importance to CHZ. We strive to deliver this through operational excellence and continual improvement. We track and analyze a variety of metrics to constantly improve our products, including customer satisfaction rate and referral rate. All these measures result in high sales volume and repurchase rate of our products, which make a contribution to our further progress and customers' business.china solar led street light factory,solar powered led lights factory,all in one solar led street light factory.