Insert the tea knife slowly into the tea cake from the side of the tea cake. The edge of the tea cake is actually very loose. Scratch it with a knife a few times and the surface will fall off. If you want to wrap the cake like in a store, get some tea next to it.
Shake the tea knife back and forth, slowly press down, and let the Pu 'er tea knife slowly insert into the tea cake. The thickness of the cake is generally not thick, so don't use brute force, it is easy to hurt your hands here. Because you don't know if the tea knife will come out from the side of the tea cake and stick to your hand. So, be sure to shake it from side to side and insert it slowly. So Pu 'er can be pried open.
If the knife is thicker, the small tea cake will actually open when it is poked in. If it is a thin knife, you can enlarge the range of moving left and right, just like cutting a tea cake into two round Pu 'er (walking around the tea cake with a knife). Or cut 1 cake into 2 pieces. If this is the case, then the rest can be broken directly by hand. If not, then you may have pried off such a small piece. It doesn't matter if it's so small, because the tea cake is so messy that it's actually a little loose. After that, repeat the above actions. Insert the tea cutter into the edge and pry it open.
Now you know how to open the tea cake! But remind everyone that every time you pry a piece, try to open the tea cake by hand. If you can, don't use a tea knife, but it is also recommended to pry it layer by layer with a tea knife, so that the bottom of the leaves is good.