1. The customer delayed the order because of other things.
Maybe the market situation in their country has changed, and they are considering what countermeasures to take.
Maybe they found another partner that has an advantage over you.
Of course, it does not rule out that customers are out of thin air. They had no sincerity to place an order before.
In view of the above situation, you should first confirm what happened to the other party and what caused them not to place an order. You can say in your email that you haven't received any emails from you these days and whether you are in any trouble. If it is convenient, please tell us and we will try our best to help you.
At the same time, you might as well say that your production line is facing a tense situation, so in order to complete production as soon as possible, I hope they can place an order as soon as possible to help customers arrange a comprehensive production time plan.
Furthermore, it can be mentioned that the cost of domestic raw materials is also rising, and I hope they can be ready as soon as possible.
Customers don't reply and can't give up. You can communicate with them by telephone. I believe that God will help those who help him. Wish you success!