Yutian Optoelectronics employees respond to calls from customers, suppliers or other employees by sunset of the day they are received. This is an example of Yutian Optoelectronics' commitment to customer-friendly service. Respond quickly to you to show we care. We don't have to solve every problem or complete every task by sunset, but we should keep in touch with you, reflecting a fundamental principle of our company - that we care about our customers.