Of course, no matter how tough they are, don't argue with them. Meaningless. Find Taobao Xiaoer, get the after-sales rights list and show it to them. They know a lot about it. I have successfully refunded. If you return it on the fourth day, you can return it within 0/5 days. /kloc-after 0/5 days, I should return it in proportion. I agree to teach them by hand and guide the new products to the shelves. It's hard to achieve. If you are a white boy who knows nothing, you can learn, but the cost performance is too low. Just watch the open class. A good teacher can be said to be one percent and will not contact you actively. I am also an old revolutionary. Don't lie. I'm ashamed.