Chinese President Xi Jinping on Monday underscored the intractability of history as the nation commemorated the start of the War of Resistance Against Japanese Aggression 77 years ago.

"History is history and facts are facts. Nobody can change history and facts," Xi said when addressing a crowd of over 1,000 people at the Museum of the War of the Chinese People's Resistance Against Japanese Aggression in the outskirts of Beijing.

"Anyone who intends to deny, distort or beautify history will not find agreement among Chinese people and people of all other countries," he said, referring to widespread concerns that Japan is trying to distort the history of the war.

"It's a pity that a small minority of people still ignore iron-clad history and the fact that tens of millions of innocent people sacrificed their lives in the war," he said.

This minority has repeatedly denied or even beautified the history of invasion, undermining mutual trust among states and creating regional tensions. Such behavior has been strongly condemned by the world's peace-loving people, said Xi.

"History is the best textbook, as well as the best dose of sobriety," Xi said, adding that Chinese people who remember the torment of war have always been in pursuit of peace.

"History tells us that any aggression by force is doomed to fail," Xi warned. "China will unswervingly pursue the road of peaceful development and hope all other countries in the world can take the same road."

Japan invaded northeast China in September 1931. But historians agree that Japan's full-scale invasion started on July 7, 1937, when a crucial access point to Beijing, Lugou Bridge, was attacked by Japanese troops.

Xi said the Chinese nation at that time faced the most direct threats, prompting "all ethnic groups, classes, parties, social organizations and patriots from all circles, as well as Hong Kong, Macao and Taiwan compatriots and overseas Chinese, to unite and throw themselves into a grand struggle which meant life and death for the Chinese nation."

He added that the Communist Party of China had also shouldered its historical responsibilities by calling for a national united front against Japanese invasion.

Calling the Chinese people's resistance against invasion by the Japanese a "heroic ode" in which Chinese patriots "bathed in blood," Xi said Monday's ceremony should serve to recall history, commemorate martyrs, cherish peace and sound a warning for the future.

The Chinese president also unveiled a sculpture commemorating the start of China's War of Resistance Against Japanese Aggression, in the company of veteran Chinese soldiers who took part in the war, as well as Chinese teenagers.

The sculpture is based on a military medal specially designed for veteran soldiers who fought the war from 1937 to 1945.

"The inauguration of this sculpture commemorates those who devoted their lives to fighting for national independence and freedom as well as those who made great contribution to peace and justice, and to console the victims of the war," Xi said.