This problem has aroused many people's doubts and worries. We know that black bandage, as a traditional Chinese medicine, has high medicinal value and market demand. With the improvement of health awareness, more and more people begin to pay attention to and use black bandages. So it's not surprising that the price of black bandage in 400 yuan appears on the market.

However, we need to look at this problem rationally. The price of black bandage varies with the origin, quality and processing technology. There are various black bandages with different prices on the market, ranging from tens to hundreds. So 400 yuan's black bandage is unreliable.

It should also be noted that some unscrupulous merchants may take advantage of the public's lack of understanding of black bandages and deliberately raise prices to obtain higher profits. This kind of behavior is neither welcome nor legal.

How to tell the authenticity when buying black bandages? First of all, we should choose formal channels to buy, such as buying in regular pharmacies or professional Chinese herbal medicine markets; Secondly, we should pay attention to the relevant information on commodity packaging and labels to ensure that the information such as production date, manufacturer and product batch number is complete and true; You can consult professionals, such as doctors or Chinese pharmacists, to get more knowledge about black bandages and purchase suggestions.

The price of black bandage in 400 yuan is not reliable. We should keep rational thinking, choose formal channels when buying, and pay attention to commodity information. For Chinese herbal medicine such as black bandage, we should fully understand its efficacy and usage in order to make a wise consumption decision.