The bronze heads of a rat and a rabbit, donated by the Pinault family of France in April, are on display at the National Museum of China in Beijing, capital of China, July 18, 2013. The two pieces of relics were among 12 animal head sculptures that formed a zodiac water clock previously stood at Yuanmingyuan, or the Old Summer Palace, in northwest Beijing. They were looted by Anglo-French Allied forces during the Second Opium War in 1860. [Photo/Xinhua] 

The bronze heads of a rat and a rabbit, donated by the Pinault family of France in April, are on display at the National Museum of China in Beijing, capital of China, July 18, 2013. The two pieces of relics were among 12 animal head sculptures that formed a zodiac water clock previously stood at Yuanmingyuan, or the Old Summer Palace, in northwest Beijing. They were looted by Anglo-French Allied forces during the Second Opium War in 1860. [Photo/Xinhua] 

The bronze heads of a rat and a rabbit, donated by the Pinault family of France in April, are on display at the National Museum of China in Beijing, capital of China, July 18, 2013. The two pieces of relics were among 12 animal head sculptures that formed a zodiac water clock previously stood at Yuanmingyuan, or the Old Summer Palace, in northwest Beijing. They were looted by Anglo-French Allied forces during the Second Opium War in 1860. [Photo/Xinhua] 

The bronze heads of a rat and a rabbit, donated by the Pinault family of France in April, are on display at the National Museum of China in Beijing, capital of China, July 18, 2013. The two pieces of relics were among 12 animal head sculptures that formed a zodiac water clock previously stood at Yuanmingyuan, or the Old Summer Palace, in northwest Beijing. They were looted by Anglo-French Allied forces during the Second Opium War in 1860. [Photo/Xinhua] 

A bronze head of a rat is on display at the National Museum of China in Beijing, capital of China, July 18, 2013. The bronze heads of a rat and a rabbit, donated by the Pinault family of France in April, were on display at the museum Thursday. The two pieces of relics were among 12 animal head sculptures that formed a zodiac water clock previously stood at Yuanmingyuan, or the Old Summer Palace, in northwest Beijing. They were looted by Anglo-French Allied forces during the Second Opium War in 1860. [Photo/Xinhua]

A bronze head of a rabbit is on display at the National Museum of China in Beijing, capital of China, July 18, 2013. The bronze heads of a rat and a rabbit, donated by the Pinault family of France in April, were on display at the museum Thursday. The two pieces of relics were among 12 animal head sculptures that formed a zodiac water clock previously stood at Yuanmingyuan, or the Old Summer Palace, in northwest Beijing. They were looted by Anglo-French Allied forces during the Second Opium War in 1860. [Photo/Xinhua]