Not entirely impolite, but the conversation was unpleasant. Diesel cars need to add AdBlue, which is uncommon in China. I didn't know about it, and they should have informed me when I picked up the car to avoid problems later on. I had to contact customer service multiple times, and international calls are expensive! Luckily, I saw the prompt. If I hadn't noticed it, who would have paid for the towing service? I later realized that this thing had to be added continuously. So why not mention it in advance? Tourists from other countries might not be familiar with your car's special requirements! I added AdBlue twice. When I claimed the reimbursement, the counter staff asked me why it was twice. How should I answer that? I could only say that your car prompted me twice! Such unnecessary questions are not needed. I didn't want to add it twice either! Additionally, when charging fees, just charge my credit card in euros. My credit card will handle the conversion. Why convert to dollars? Not only is the exchange rate high, but there are also extra fees!