China softens tone on Japan's war crimesBy Mure Dickie in Beijing Published: December 14 2007 02:00 | Last updated: December 14 2007 02:00 China yesterday marked the 70th anniversary of the Nanjing Massacre by opening a memorial hall that blends commemoration of atrocities inflicted by invading Japanese with a message of peace.The relatively positive tone of the new hall, along with measured repor