How to buy calligraphy without a certificate?

Does the subject want to ask "how to sell calligraphy without a certificate"? No certificate is required. Calligraphy trading only needs a facade operation, that is, it needs an industrial and commercial license without a certificate. So you don't need a certificate to sell calligraphy. Calligraphy is an artistic expression of the unique beauty of words in China and neighboring countries and regions deeply influenced by China culture.