第四章研究著作权保护年限对美术作品衍生产品授权的影响，以书画开发过程和故宫博物院的艺术授权年限为案例进行分析。

In the fifth chapter the paper researches the influence to accrediting of the art derivatives from the protection of life by Copyright Law, and analyses the case of the Forbidden City.

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美术馆是一个综合收藏、展示、教育和研究的艺术文化机构。

Art museum is an institution of comprehensive collection, display, education and research for art and culture.

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作品曾被中国美术馆和中国艺术研究院等机构和个人收藏。

Art works were collected by national art museum of China and China art research institute and other institutions including personal collection.

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