Local residents view a tombstone in Beihai, Guangxi Zhuang Autonomous Region on Wednesday. The tombstone was said to belong to a 23-year-old German sailor who died at an undisclosed date. Two tombstones were discovered on Wednesday during work on underground gas pipes. Historians believe that the sailor's tombstone is connected with foreign invasions of China in the 19th century and could provide important information on that time. Photo: CFP