Philosophical research on the productive protection of intangible cultural heritage Empirical research on trademark protection of intangible cultural heritage Policy support for productive protection of intangible cultural heritage 并列题名：Policy support for productive protection of intangible cultural heritage Research on the legal protection of intangible cultural heritage Research on legal protection of intangible cultural heritage 并列题名：Research on legal protection of intangible cultural heritage Reflections on the protection of intangible cultural heritage Research on the digitization of intangible cultural heritage Research on the virtual visualization of intangible cultural heritage