Objectively speaking, Amazon's system and labor may also make mistakes. We have served two customers before. The goods were returned from Amazon to our US warehouse and UK warehouse respectively. The boxes received by the UK warehouse were attached with a packing list, but the warehouse opened the box immediately after receiving it and found that one was missing. The US warehouse received no list, but it was also one less than Amazon's background record. Therefore, the warehouse can only be based on the actual quantity received