China has invited leaders from more than 50 countries to a ceremony on Sept. 3 to mark the 70th anniversary of the end of World War II, but most of them are still undecided about their participation, diplomatic sources said Thursday.

While no Western leaders have confirmed their attendance, only a limited number of countries, including Cuba, Kazakhstan, Mongolia, Pakistan, Russia, Tajikistan and Uzbekistan, have so far told China that they plan to be part of the event celebrating what it calls its day of victory in a war of resistance against Japan's aggression, the sources said.

Chinese President Xi Jinping will oversee a military parade in Tiananmen Square and deliver a speech that day.