The current international protection model for new plant varieties is the first International Convention for the Protection of New Varieties of Plants (UPOV) adopted in 1961. The Convention stipulates that member states can choose to provide special protection to plant growers or Patent protection is granted, but the two cannot be used together. Most member states have chosen to grant protection to plant variety rights. With the development of biotechnology, the protection of new plant varieties requires replacing the protection of this special law with patent law and strengthening the rights of breeders. In 1991, UPOV was revised for the third time, adding some provisions for member states to choose to apply, thus strengthening the protection of new plant varieties. The revised Convention stipulates that if member states deem it necessary, the scope of protection can be extended to parts other than reproductive substances. Any products obtained from protected varieties shall not enter production and circulation without the consent of the right holder. This clearly allows member states to provide patent protection for plant varieties, thus abandoning the 1978 UPOV position prohibiting dual protection.