Hello
This is Claire from Dongguan, where is near to Shenzhen, about half hours by car.
I believe your factory locate in different town/district of Shenzhen, so, I should also be the correct person.
I can help you visit different factories to make sure that the packing of their products is matching with your requirements.
I have worked for many different Amazon sellers, I know how to check the quality and packing.
We can discuss the price when I see the details of your job.
Best regards
Claire