while customer received the goods?

While the customer received the goods, How many days you will contact with your customer? And for the mail what you always want to write?

I think one week is enough for my customer to test the quality

Anytime you want, just keep in touch.

you know always don't know how to write to them, also you want to keep in touch with them?
$TA+TP2b.Ub just greeting??

can thought the forward tracing  the cargo, and inform you client about arrival time, you can ask how about your productions in market,you can tell them have any problem can contact you,introduce new samples.

now the goods is on customer workshop, during this days, i ask them the using situation, if meet any problem, contact with us.