Hello, to tell the truth, Wu Bi's short-term skills have not been greatly improved. The memory of the root sound and the clarity of the initial sound are subjective factors, and the speed of fingering is also very important. It is a good way to practice more. Single finger speed can only be stable. I suggest you choose two or three fingers when practicing, so it will be much faster to practice single finger again. You don't have to worry about a single finger. If you make a mistake, you will ... Personally, when counting money, 100 will be twisted with your thumb for three times (about 30 pieces each time), and your elbow will be too high, and your body will be slightly tilted to the position where banknotes are easy to be twisted. Ask an expert to help you correct it. The key is to get in touch, comrade, and practice quickly, hehe PS: it's basically over ... but don't be too shameful.