Good morning sir. I verified the records of the after-sales group. Whenever you have time, our engineers are actively guiding you to operate the machine. The engineer sends you a teaching video via email, which you can’t understand, and then we guide you step by step through video calls. Every time you have time, our engineers are responsive to your needs. In addition, it may be that you have less time to study each time, so you cannot master the operation of the machine well. Now compared with other customers, they receive the goods later, but the printing effect is already very good. Engineers suggest that if you can arrange for people to study full-time, you can generally study well in a week, and we will try our best to cooperate with you. Thank you so much.