2. From the tea itself. First of all, from the appearance of tea, look at the cake shape of tea. In the past, when tea was made by various manufacturers, the shapes of tea leaves were different because of the different sizes of bags, molds, ways of rolling tea leaves, knotting methods of bags and pressure modulation of presses. There is also the difference in materials. Each manufacturer's tea mixing method is different, and the level of materials used will be different. Therefore, the manufacturer of this tea can roughly judge by the different combinations of cake shape and tea raw materials.
3. The color change and looseness of tea can also roughly judge the factory age of tea. The rule of tea color change is that the longer the year, the darker the color. Of course, this is generally not suitable for some special teas. For example, wild tea and transitional tea are dark in color. Of course, this color is different from old tea. The color of the artificially planted old tea is dark brown, but it is difficult for some new tea lovers to distinguish it. Old tea is relatively easy to disperse. Generally speaking, it basically falls off from the edge and develops towards the middle with the passage of time. This kind of shedding is natural, without any fracture and without any man-made signs. If there is a breakpoint, there must be something wrong. Of course, some teas are foamed by the whole cake, just like bread, which is more common in cooked tea. Of course, this foaming phenomenon may also be that the pressure of tea leaves is relatively low when pressed, or that tea leaves bubble after being wetted during storage, which depends on the specific situation.
Judging from the taste of tea. This is even more difficult, because it is difficult for you to know exactly where this tea went in the decades after it left the factory. The taste of tea in the later stage of transformation has a great relationship with the storage place, and the same tea stored in different places will be very different. For example, the same batch of the same tea will taste very different after being stored in Guangdong and Kunming for 20 years. Tea stored in Yunnan, Banna and Kunming are different in taste after more than ten years, which brings great uncertainty to the identification of old tea. Unless you have tasted the old tea stored in various places and can identify its characteristics, it is difficult to identify its year and place of origin, which is actually the place where old tea is easy to be faked.