Exploration of strategies on patent licensing and Chinese materia medica internationalization Essential procedure and key methods for survey of traditional knowledge related to Chinese materia medica resources Research of traditional Chinese medicine and protection of intellectual propertyright Analysis on current situation of intellectual property of Chinese materia medica based on weighted average method Analysis on European patents of traditional Chinese medicine in recent 20 years Protection and Development of Agro-biotechnology Intellectual Property Rights Relevant patent information analysis on cultivation techniques and compatibility of whole herb of Erigeron breviscapus