求翻译：感谢你对我们公司产品的赞同，我们都有合作的意向，有问题我们一同解决，（1）在你转账之前我可以发给你一份发票（2）你可以先预付70%的资金（3）你如果有中国的朋友，可以让他来我们公司考察是什么意思？

We thank you for the products endorsed, we have the cooperation intention, together we solve the problem, (1) I can send you a copy of the invoice before you transfer (2) you can prepay 70% funds (3) If you have any Chinese friends, allowing him to visit our company