Generally speaking, it may take a few months for beginners to master the basic Chinese pastry making skills, such as mixing, kneading and rolling. However, it may take longer time and more practice to achieve proficiency or mastery. In this process, you also need to know the making methods and recipes of different pasta, which also takes some time and energy.
In addition, there are many kinds of cakes in China, and the production methods and skills of each kind of cakes are different. So you may need to learn different kinds of pasta separately, which requires extra time and energy.
Generally speaking, there is no fixed standard for the length of time to learn Chinese pastry. I suggest that you arrange your study time according to your actual situation and study progress, keep patience and enthusiasm, keep learning and practicing, and gradually improve your pastry making level. At the same time, you can also consider taking a professional pastry training course or consulting an experienced pastry chef to speed up your study.