There are many business card printing shops, but there are also many who have just learned to open stores, so you can't study in Nantong. Even if you spend money, he may not teach you, for fear of robbing him of his job. This is Nantong's idea. Actually, you can consider going to Zhejiang. Ke Qiao, Zhejiang is China Textile City, the largest market in Asia. Baidu: Ke Qiao designs a street. You can search their website, where there are professional trainings. It is famous all over the country.