Do you mean that you want to contribute after writing calligraphy works? It depends on which level you are going to vote for. The national calligraphy exhibition is a national exhibition, about three times a year, and so is the provincial exhibition. Don't vote below the municipal level, it's meaningless. Pay attention to the exhibition information in real time, and there will be a submission address. Make sure that the content, size and style of your work meet the exhibition requirements, and then send it directly by express delivery. If you need to reject the manuscript, you have to pay extra.
The Taobao shop is called Xiyuantang, and it is written in Four Treasures of the Study. You can go in and have a look. Old shops are newly opened and new products are supplied.