tushunchang

I’m not able to identify a widely recognized topic by the name “tushunchang.” Could you tell me what it refers to? For example, is it a term from a particular language, a place or person, an organization, a concept in a field, or a fictional/creative concept? If you provide the context or intended use, I can draft a neutral, wiki-style article (under 300 words). If you’d like, I can also create a fictional encyclopedia-style entry with clear disclaimers.