A bust statue of Julius Caesar is seen during an exhibition at Hong Kong Science Museum in south China's Hong Kong, Jan. 23, 2013. Exhibition "Julius Caesar - Military Genius and Mighty Machines" is underway at the Hong Kong Science Museum. More than 40 exhibits reflecting the science and technology of ancient Romans were displayed on the show. (Xinhua/Zhao Yusi)

A grinding machine of ancient Rome is seen during an exhibition at Hong Kong Science Museum in south China's Hong Kong, Jan. 23, 2013. Exhibition "Julius Caesar - Military Genius and Mighty Machines" is underway at the Hong Kong Science Museum. More than 40 exhibits reflecting the science and technology of ancient Romans were displayed on the show. (Xinhua/Zhao Yusi)

A visitor takes photo of the mosaic works of ancient Rome during an exhibition at Hong Kong Science Museum in south China's Hong Kong, Jan. 23, 2013. Exhibition "Julius Caesar - Military Genius and Mighty Machines" is underway at the Hong Kong Science Museum. More than 40 exhibits reflecting the science and technology of ancient Romans were displayed on the show. (Xinhua/Zhao Yusi)

Visitors work on mosaic patches to experience the mosaic art of ancient Rome is seen during an exhibition at Hong Kong Science Museum in south China's Hong Kong, Jan. 23, 2013. Exhibition "Julius Caesar - Military Genius and Mighty Machines" is underway at the Hong Kong Science Museum. More than 40 exhibits reflecting the science and technology of ancient Romans were displayed on the show. (Xinhua/Zhao Yusi)

A visitor reads the introduction of the model of a Rome siege weapon during an exhibition at Hong Kong Science Museum in south China's Hong Kong, Jan. 23, 2013. Exhibition "Julius Caesar - Military Genius and Mighty Machines" is underway at the Hong Kong Science Museum. More than 40 exhibits reflecting the science and technology of ancient Romans were displayed on the show. (Xinhua/Zhao Yusi)

A visitor watches the model of a Rome siege weapon during an exhibition at Hong Kong Science Museum in south China's Hong Kong, Jan. 23, 2013. Exhibition "Julius Caesar - Military Genius and Mighty Machines" is underway at the Hong Kong Science Museum. More than 40 exhibits reflecting the science and technology of ancient Romans were displayed on the show. (Xinhua/Zhao Yusi)

A replica of an ancient Rome map is seen during an exhibition at Hong Kong Science Museum in south China's Hong Kong, Jan. 23, 2013. Exhibition "Julius Caesar - Military Genius and Mighty Machines" is underway at the Hong Kong Science Museum. More than 40 exhibits reflecting the science and technology of ancient Romans were displayed on the show. (Xinhua/Zhao Yusi)

Models of ancient Rome's gladiator are seen during an exhibition at Hong Kong Science Museum in south China's Hong Kong, Jan. 23, 2013. Exhibition "Julius Caesar - Military Genius and Mighty Machines" is underway at the Hong Kong Science Museum. More than 40 exhibits reflecting the science and technology of ancient Romans were displayed on the show. (Xinhua/Zhao Yusi)

Visitors watch the ancient Rome-related exhibits during an exhibition at Hong Kong Science Museum in south China's Hong Kong, Jan. 23, 2013. Exhibition "Julius Caesar - Military Genius and Mighty Machines" is underway at the Hong Kong Science Museum. More than 40 exhibits reflecting the science and technology of ancient Romans were displayed on the show. (Xinhua/Zhao Yusi)

Visitors watch the ancient Rome-related exhibits during an exhibition at Hong Kong Science Museum in south China's Hong Kong, Jan. 23, 2013. Exhibition "Julius Caesar - Military Genius and Mighty Machines" is underway at the Hong Kong Science Museum. More than 40 exhibits reflecting the science and technology of ancient Romans were displayed on the show. (Xinhua/Zhao Yusi)

Models in ancient Rome armors are seen during an exhibition at Hong Kong Science Museum in south China's Hong Kong, Jan. 23, 2013. Exhibition "Julius Caesar - Military Genius and Mighty Machines" is underway at the Hong Kong Science Museum. More than 40 exhibits reflecting the science and technology of ancient Romans were displayed on the show. (Xinhua/Zhao Yusi)

Visitors watch the ancient Rome-related exhibits during an exhibition at Hong Kong Science Museum in south China's Hong Kong, Jan. 23, 2013. Exhibition "Julius Caesar - Military Genius and Mighty Machines" is underway at the Hong Kong Science Museum. More than 40 exhibits reflecting the science and technology of ancient Romans were displayed on the show. (Xinhua/Zhao Yusi)

An Aquila statue is seen during an exhibition at Hong Kong Science Museum in south China's Hong Kong, Jan. 23, 2013. Exhibition "Julius Caesar - Military Genius and Mighty Machines" is underway at the Hong Kong Science Museum. More than 40 exhibits reflecting the science and technology of ancient Romans were displayed on the show. (Xinhua/Zhao Yusi)

A visitor watchs the ancient Rome-related exhibits during an exhibition at Hong Kong Science Museum in south China's Hong Kong, Jan. 23, 2013. Exhibition "Julius Caesar - Military Genius and Mighty Machines" is underway at the Hong Kong Science Museum. More than 40 exhibits reflecting the science and technology of ancient Romans were displayed on the show. (Xinhua/Zhao Yusi)

A statue of the ancient Rome is seen during an exhibition at Hong Kong Science Museum in south China's Hong Kong, Jan. 23, 2013. Exhibition "Julius Caesar - Military Genius and Mighty Machines" is underway at the Hong Kong Science Museum. More than 40 exhibits reflecting the science and technology of ancient Romans were displayed on the show. (Xinhua/Zhao Yusi)