File photo shows the corpses of refugees massacred by Japanese troops during the Nanjing Massacre in the 1930s. Chinese lawmakers are mulling making December 13 a national memorial day to commemorate those killed by Japanese aggressors during the Nanjing Massacre. The draft decision will be discussed at the bi-monthly session of the Standing Committee of the National People's Congress (NPC) which runs from Tuesday through Thursday. Japanese troops started the massacre in Nanjing on Dec. 13, 1937, killing more than 300,000 people in the following 40-odd days. [Xinhua]