A visitor lays a flower during the inauguration ceremony of the Monument of John Rabe in Berlin, Germany, on Dec. 11, 2013. Opening ceremony of the memorial cemetery dedicated to Siemens businessman John Rabe, who saved lives of hundreds of thousands of Chinese in Nanjing during World War II, was held in Berlin on Wednesday. (Xinhua/Zhang Fan)

John Rabe's grandson Thomas Rabe (Front) lays a wreath during the inauguration ceremony of the Monument of John Rabe in Berlin, Germany, on Dec. 11, 2013. Opening ceremony of the memorial cemetery dedicated to Siemens businessman John Rabe, who saved lives of hundreds of thousands of Chinese in Nanjing during World War II, was held in Berlin on Wednesday. (Xinhua/Zhang Fan) (Xinhua/Zhang Fan)

Chinese Ambassador to Germany Shi Mingde (1st R) speaks as John Rabe's grandson Thomas Rabe (1st L) listens during the inauguration ceremony of the Monument of John Rabe in Berlin, Germany, on Dec. 11, 2013. Opening ceremony of the memorial cemetery dedicated to Siemens businessman John Rabe, who saved lives of hundreds of thousands of Chinese in Nanjing during World War II, was held in Berlin on Wednesday. (Xinhua/Zhang Fan) (Xinhua/Zhang Fan)

A man takes photos of the Monument of John Rabe ahead of the inauguration ceremony in Berlin, Germany, on Dec. 11, 2013. Opening ceremony of the memorial cemetery dedicated to Siemens businessman John Rabe, who saved lives of hundreds of thousands of Chinese in Nanjing during World War II, was held in Berlin on Wednesday. (Xinhua/Zhang Fan) (Xinhua/Zhang Fan)

Chinese Ambassador to Germany Shi Mingde (2nd R Front) and John Rabe's grandson Thomas Rabe (4th L Front) attend the inauguration ceremony of the Monument of John Rabe in Berlin, Germany, on Dec. 11, 2013. Opening ceremony of the memorial cemetery dedicated to Siemens businessman John Rabe, who saved lives of hundreds of thousands of Chinese in Nanjing during World War II, was held in Berlin on Wednesday. (Xinhua/Zhang Fan) (Xinhua/Zhang Fan)

Visitors are reflected on the Monument of John Rabe during its inauguration ceremony in Berlin, Germany, on Dec. 11, 2013. Opening ceremony of the memorial cemetery dedicated to Siemens businessman John Rabe, who saved lives of hundreds of thousands of Chinese in Nanjing during World War II, was held in Berlin on Wednesday. (Xinhua/Zhang Fan) (Xinhua/Zhang Fan)

People walk by wreaths during the inauguration ceremony of the Monument of John Rabe in Berlin, Germany, on Dec. 11, 2013. Opening ceremony of the memorial cemetery dedicated to Siemens businessman John Rabe, who saved lives of hundreds of thousands of Chinese in Nanjing during World War II, was held in Berlin on Wednesday. (Xinhua/Zhang Fan) (Xinhua/Zhang Fan)