How to treat seven-day unreasonable return?

Rationally speaking, if the seven-day unreasonable return clause between the seller and you does not involve the time difference of the courier company, then the seller has reason to refuse your return request. Because the courier link is an agreement reached between you and the courier company, it has nothing to do with the seller, and the delay of the courier company is not the seller's responsibility. If you can't return the goods normally because the courier company delays receiving the goods, you can ask the courier company to bear this responsibility, but in fact there is no agreement between you and the courier company on this responsibility, so even if you sue the courier company in law, you won't win the case. In the final analysis, this responsibility needs to be borne by yourself, because you did not foresee the possible delay of the courier company, or did not reach a compensation agreement with the courier company on the consequences of the delay. And you didn't type in advance, which happened to be the seventh day when you wanted to return the goods. This is a real hanging.