sentences:  During the 1960s and 1970s, the National Palace Museum was used by the Kuomintang to support its claim that the Republic of China was the sole legitimate government of all China, in that it was the sole preserver of traditional Chinese culture amid social change and the Cultural Revolution in mainland China, and tended to emphasize Chinese nationalism.The People's Republic of China (PRC) government has long said that the collection was stolen and that it legitimately belongs in China, but Taiwan has defended its collection as a necessary act to protect the pieces from destruction, especially during the Cultural Revolution.However, relations regarding this treasure have warmed in recent years and the Palace Museum in Beijing has agreed to lend relics to the National Palace Museum for exhibitions since 2009.