Programming is a process of constantly discovering and solving problems. This process will occur frequently at the beginning, indicating that your level has just begun, and you need to constantly learn and strengthen yourself in actual combat. At some point, occasionally there will be problems, indicating that you have become a qualified programmer. When you join a team, practice one project after another. This time may be very long. After several years, you will find that there will be fewer and fewer problems you encounter. At this time, it is basically a master.