Now I look back, this thing has some important implications.
First, what was the purpose of the work? The primary purpose was to display information about the room availability and contact information, and the aesthetic part was secondary. My struggle was too much concern about the aesthetic part that caused stress to myself. It may invite appreciation if the writing were more artistic, but that was not the purpose. People contacted my parents mainly because they needed to rent the space not because however awesome handwriting triggered their need for renting the space.
Second, what was the expectation of performance? From the eyes of my parents and other people who had not learned to use brush pen, my writing was good enough to serve both purposes. This is also the case in the workplace. It is not about the ultimate perfection I have in my mind, but it is about what the clients need and expect.
Third, why me? There must be millions of people in China who can write better calligraphy than I. But I was the most convenient and available person to my parents. It was also my pleasure to be helpful to them. Likewise in the workplace or the school, you may feel that you don't deserve some position by breaking down the skills sets and comparing them to the top experts in the field. In many cases, however, everything works together to make you the best candidate, such as timing, your availability, your good enough skill sets, your good personality, and your connection to this employer.
We often do not know what the next life tasks will be. But given our best judgement, whatever we end up getting, work with conscientiousness and be thankful. Improvement is a life-long process, and completion is better than perfection.