In terms of efficacy, it is stipulated in National Medical Products Administration that the bioavailability of generic drugs should be as close as possible to the original drug, but the clinical effect is not stipulated. A small number of clinical reports point out that the efficacy of Qiyue is equivalent to that of Propafenone, but whether it is completely equivalent or not is anybody's guess. Because the preparation process is imitated after all, the formula and the proportion of auxiliary materials in it may be different from that of Baofazhi. These factors have a subtle influence on the efficacy, and may be a little worse, which is why the price of imported original drugs is often higher than that of domestic drugs, and people usually choose imported drugs.
For example, Coca-Cola, which looks like a simple drink, can really be imitated like no domestic beverage manufacturer can, because when you imitate Coca-Cola as a standard, it is doomed to be impossible to surpass or completely equivalent, and what you can do is at most infinitely close.