Zhang Xiaoyu's nude art photos involve two aspects of legal protection: one is the rights protection of the photographer, and the other is the legal protection of the portrait right holder. Article 7 of the fourth item of China's Copyright Law and the seventh item of the Copyright Implementation Regulations clearly stipulate that photographic works are protected by copyright law. Since Zhang Xiaoyu's nude art photos also fall under the category of photographic works, they are therefore protected by law.