The R mark and TM mark mentioned by the questioner should refer to the trademark registration symbols. According to the regulations of the National Trademark Office, the upper right corner of the brand trademark is marked with a circle R (Register abbreviation): ? means that the trademark has been Apply for registration at the National Trademark Office and have it approved by the Trademark Office, becoming a registered trademark. The trademark is marked with TM (Trademark abbreviation) in the upper right corner: The ? mark indicates that the trademark has been applied to the National Trademark Office, and the National Trademark Office has also issued an "Acceptance Notice" and entered the opposition period, so as to prevent others from using it. Submitting a duplicate application also means that the existing trademark holder has priority to use it (the marked content is a trademark but does not necessarily have to be registered). As for the quality of milk, whether the brand trademark has been registered has no reference significance for judging the quality. The quality of milk depends mostly on the quality of the milk source. The milk source base of large enterprises is larger, and the quality control of the milk source is relatively more difficult. Scientific and stable, with high trust value. But there are also some less well-known brands. Since the milk comes from a group of high-quality cows, the quality, taste and nutritional value of the milk produced are higher. In addition to the source of milk, the processing method is also a key factor in determining the quality of milk. When purchasing milk, try to choose "fresh" milk whose ingredient list only contains raw milk. The word "fresh" is particularly emphasized here. Generally speaking, Refrigerated pasteurized milk (the fresh milk we usually see in supermarkets) has a higher water-soluble vitamin content than normal temperature ultra-high temperature sterilized milk (pure milk), making it more suitable for daily drinking. Of course, if possible, it is best to choose a local fresh milk bar to buy pasteurized milk on the same day, because such milk is often milked by dairy farmers and delivered to stores for water bath pasteurization and sale on the same day, ensuring the freshest quality. The above is my answer. I hope it can bring some help to the questioner. Thank you!