Secondly, the company has no export qualification, and it is nonsense to carry out foreign trade, unless it only plays the role of an intermediary negotiation and is not responsible for import and export, but this foreign trade department is too serious.
Furthermore, why did the boss propose a joint venture with a candidate? This should be with people you know and trust very well. I think it's a pit for this boss to pull you into the joint venture. He used your identity and information to get a loan, and then ran away by himself. Although it is a guess, there have been such examples around him, which I have to consider.
Finally, about the foreign trade plan, he asked you to send him a complete electronic version, perhaps not because he wanted to see if you were capable, but because he wanted you to make one, and they took it because they didn't have it at all. Many interviewers assign tasks to cheat their works, which must be guarded against.
Although many of the above are my personal opinions, there are too many doubts. I don't think this kind of company will go. Foreign trade is still a hot industry, and jobs are still easy to find. Let's find another one.