What if the customer doesn't reply after replying to the inquiry in foreign trade?

Send it again in a few days, to put it mildly, just say that I don't know if I have received a reply and want to remind the other party; If you receive it, please briefly explain your thoughts. If you still can't get a reply from the other party, then find another opportunity later; If you receive a reply, make clear what the other person really thinks, prescribe the right medicine, and see if you can make some concessions or attach some small favors.