Hello, there is actually no strict distinction between these four herbs in clinical practice. The main reason is that liver stagnation and qi stagnation often coexist clinically. For example, in the treatment of liver qi stagnation, discomfort in the ribs and flanks, poor menstruation, and abdominal distension and pain, turmeric, bupleurum, and cyperus are often used together to relieve the qi stagnation in the liver meridian, unblock the liver qi mechanism, and restore the liver's soothing function. Release function to achieve the purpose of healing. If I have to make a distinction, my understanding is basically the same as yours. Clinically, it mainly depends on the degree of liver stagnation and qi stagnation, and differentiates the medication.