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