What is the 7/8/15/30 Return and Exchange Goods Service in 1688?-3

Other instructions:

No man-made damage refers to no damage to the product appearance and no impact on secondary sales (no impact on secondary sales refers to the requirements of a complete outer package, accessories, invoices, tags, etc., upon receipt of the product; 2, no wear, damage, traces of use of the product and accessories; 3, the main engine of the product has not been dismantled and artificially damaged; 4, the product appearance has no fading, yellowing, dirt and serious folds, etc.)