Q. Can I change it to another product when the product is sold out?

A. You can change the only same product, impossible the another product.

Q. When the product is out of stock, if the product is out of stock, it falls short of the free delivery policy standard, what should I do with the shipping cost?

A.If the amount of free shipping fee is not satisfied due to the occurrence of sold-out products among the ordered products, should subtract the shipping fee in the product price and then process the refund.