The foreign customer refused to chat with the company online through the company mailbox and insisted that I add her private WeChat communication. Why?

I don't think it is advisable to add private WeChat to talk about work. Besides, you said your client is Russian. We know that Russian customers are actually not very trustworthy. Why make good use of the company's tools and add private WeChat? There must be a reason for the problem. In particular, I have read many reports before. In fact, Russians are very unfriendly to China businessmen. It often plunders shops in China in the name of eliminating smuggling, which is a robber-like behavior without any explanation. . I think you can also add him to WeChat chat and see what he says. In fact, I guess what he said must be a problem that can't be said so openly. So you just need to grasp your bottom line, and don't be moved by each other's rhetoric, because sometimes they have a lot of tricks with foreign businesses. It is especially common that they require delivery before payment, which is a common trick. If you are not experienced enough in dealing with foreigners, you will sometimes be cheated, because there are many such examples. In short, to grasp an abnormal phenomenon, it is estimated that something abnormal will happen. Therefore, prevention first, safety first, or caution is the best.