By Peter CATTERALL Agence France-Presse RUDONG, China (AFP) — At the end of a back alley surrounded by dilapidated buildings, the pitter-patter of ping-pong balls echoes around a cavernous warehouse in a Chinese town north of Shanghai. The members of this table tennis club in Rudong, a sleepy seaside county with one of the highest proportions of elderly residents in China, gather to exercise and catch up. Rudong once played a pioneering role in […]