What were types of torture used in the nanking massacre?

The incident is

also known as "The Rape of Nanking," is a rare example of

simultaneous gendercides against women and men. It is generally

remembered for the invading forces' barbaric treatment of Chinese

women. In WW2 the Japanese invaded china. Men were rounded up and

the heads cut in tournaments to see who could cut most heads. Many

thousands of women were killed after gang rape, and tens of

thousands of others brutally injured and traumatized. Meanwhile,

approximately a quarter of a million defenseless Chinese men were

rounded up as prisoners-of-war and murdered en masse, used for

bayonet practice, or burned and buried alive.