BENXI, China — Eighty years after the end of World War II , Japan and China are marking the anniversary with major events, but on different dates and in different ways. Japan remembers the victims in a solemn ceremony on Aug. 15, the day then-Emperor Hirohito announced in a crackly radio message that the government had surrendered, while China showcases its military strength with a parade on Sept. 3, the day after the formal surrender on an American battleship in Tokyo Bay. Japan occupied much