A visitor poses for a photograph in an optical illusion installation at the Imagine Your Museum of Art exhibition in Beijing October 2, 2015. (Photo by Jason Lee/Reuters)





A visitor holding poses for a photograph in an optical illusion installation at the Imagine Your Museum of Art exhibition in Beijing October 2, 2015. (Photo by Jason Lee/Reuters)





A visitor poses for a photograph in an optical illusion installation at the Imagine Your Museum of Art exhibition in Beijing October 2, 2015. (Photo by Jason Lee/Reuters)





A visitor holding a light poses for a photograph in an optical illusion installation at the Imagine Your Museum of Art exhibition in Beijing October 2, 2015. (Photo by Jason Lee/Reuters)





Visitors pose for a photograph in an optical illusion installation at the Imagine Your Museum of Art exhibition in Beijing October 2, 2015. (Photo by Jason Lee/Reuters)





Visitors pose for a photograph in an optical illusion installation at the Imagine Your Museum of Art exhibition in Beijing October 2, 2015. (Photo by Jason Lee/Reuters)





Visitors pose for a photograph in an optical illusion installation at the Imagine Your Museum of Art exhibition in Beijing October 2, 2015. (Photo by Jason Lee/Reuters)





Hao Houhong places her friend's pet lizard Keity on her shoulder at a shopping mall in Beijing, China, October 2, 2015. (Photo by Kim Kyung-Hoon/Reuters)





A man wears a mask decorated with cigarette butts, designed by Chinese designer Wen Fang at Wen's "Maskbook" workshop during the Beijing Design Week 2015 in Beijing, China, October 2, 2015. In the workshop, participants decorated and designed masks with their own ideas, as a symbol of collective citizen action for climate change, and against pollution and smoking in public place, the designer said. (Photo by Kim Kyung-Hoon/Reuters)





Zhang Chen Xi, 9, poses with a mask which he decorated with a plastic pipe and a balloon at Chinese designer Wen Fang's "Maskbook" workshop during the Beijing Design Week 2015 in Beijing, China, October 2, 2015. (Photo by Kim Kyung-Hoon/Reuters)





Chinese designer Wen Fang adjusts straws on her mask decorated with asthma medicine bottles at her "Maskbook" workshop during the Beijing Design Week 2015 in Beijing, China, October 2, 2015. (Photo by Kim Kyung-Hoon/Reuters)





Children wearing uniforms hold a folded Chinese National flag during a military parade game on China's National Day, at Beyou World, a centre where children can experience different kinds of professions, in Beijing, October 1, 2015. (Photo by Reuters/Stringer)





Children wearing uniforms march during a military parade game on China's National Day, at Beyou World, a centre where children can experience different kinds of professions, in Beijing, October 1, 2015. (Photo by Reuters/Stringer)





Children wearing uniforms hold toy guns during a military parade game on China's National Day, at Beyou World, a centre children where can experience different kinds of professions, in Beijing, October 1, 2015. (Photo by Reuters/Stringer)





Children wearing uniforms stand in formation during a military parade game on China's National Day, at Beyou World, a centre where children can experience different kinds of professions, in Beijing, October 1, 2015. (Photo by Reuters/Stringer)





A jar overflowing with Chinese banknotes is pictured during the National Day holiday at Porcelain House in Tianjin, China, October 3, 2015. The banknotes were placed by visitors wishing for good fortune. Porcelain House, also known as China house, is a museum displaying pottery and antiques and its exterior and interior is decorated with hundreds of millions of ancient porcelain flakes, ancient bowls, dishes and vases. (Photo by Kim Kyung-Hoon/Reuters)





Visitors look above while they listen to a tour guide's explanation as they stand next to a jar overflowing with Chinese banknotes during the National Day holiday at Porcelain House in Tianjin, China, October 3, 2015. (Photo by Kim Kyung-Hoon/Reuters)





A jar overflowing with Chinese banknotes is pictured during the National Day holiday at Porcelain House in Tianjin, China, October 3, 2015. (Photo by Kim Kyung-Hoon/Reuters)