Because your question is very professional, as a person who has worked in a brewery for more than ten years, please allow me to tell you my opinion anonymously. He used the bottle of Tsingtao beer because the recycled bottle of Tsingtao beer is cheap, which can reduce the production cost. The reason why Tsingtao Brewery put the words Tsingtao Brewery on the bottle is to prevent other manufacturers from buying old bottles. But even if you use this thing, it is not a big infringement. As a consumer, you already know that the other party sells Lao Quan beer before you buy it, so you can't say it's a fake and shoddy product. Of course, it is not excluded that some criminals change trademarks and bottle caps and pretend to be Tsingtao beer for sale. If you want to fake, you may wish to contact the after-sales service of Tsingtao Brewery to provide clues or ask their opinions.