More than 30 overseas Chinese teenagers from Germany, Russia and other countries visited the Wang Yirong Museum in Yantai, East China's Shandong province on July 9 to explore the origin and evolution of Chinese characters. Chinese teenagers learn about oracle-bone inscriptions at Wang Yirong Museum, Fushan district, Yantai, East China's Shandong province on July 9. Mao Min, an expert on …