A banknote issued by Bank of China (BOC) in 1941 is seen at an exhibition preview displaying antique banknotes owned by BOC in Hong Kong, south China, on Oct. 31, 2012.(Xinhua/Chen Xiaowei)

　　Visitors take photos of HKD banknotes issued by Bank of China (BOC) in 1990s at an exhibition preview displaying antique banknotes owned by BOC in Hong Kong, south China, on Oct. 31, 2012. Starting from Thursday, the exhibition will show more than 200 items of BOC`s banknote collection to the public. (Xinhua/Chen Xiaowei)

　　A visitor attends an exhibition preview displaying antique banknotes collected by BOC in Hong Kong, south China, on Oct. 31, 2012. (Xinhua/Chen Xiaowei)