File photo shows soldiers of the No. 29 Nationalists Corps fighting hard to resist Japanese invaders at Lugou Bridge in Beijing. China was the first nation to fight against fascist forces. The struggle started on September 18, 1931, when Japanese troops began their invasion of northeast China. It was intensified when Japan's full-scale invasion began after a crucial access point to Beijing, Lugou Bridge, also known as Marco Polo Bridge, was attacked by Japanese troops on July 7, 1937. (Xinhua)

File photo shows Lugou Bridge occupied by Japanese invaders in Beijing. China was the first nation to fight against fascist forces. The struggle started on September 18, 1931, when Japanese troops began their invasion of northeast China. It was intensified when Japan's full-scale invasion began after a crucial access point to Beijing, Lugou Bridge, also known as Marco Polo Bridge, was attacked by Japanese troops on July 7, 1937. (Xinhua)

File photo shows Chinese soldiers running to resist Japanese invaders at Wanping town in Beijing. China was the first nation to fight against fascist forces. The struggle started on September 18, 1931, when Japanese troops began their invasion of northeast China. It was intensified when Japan's full-scale invasion began after a crucial access point to Beijing, Lugou Bridge, also known as Marco Polo Bridge, was attacked by Japanese troops on July 7, 1937. (Xinhua)

File photo shows Lugou Bridge occupied by Japanese invaders in Beijing. China was the first nation to fight against fascist forces. The struggle started on September 18, 1931, when Japanese troops began their invasion of northeast China. It was intensified when Japan's full-scale invasion began after a crucial access point to Beijing, Lugou Bridge, also known as Marco Polo Bridge, was attacked by Japanese troops on July 7, 1937. (Xinhua)

File photo shows Chinese soldiers fighting hard to resist Japanese invaders at Lugou Bridge in Beijing. China was the first nation to fight against fascist forces. The struggle started on September 18, 1931, when Japanese troops began their invasion of northeast China. It was intensified when Japan's full-scale invasion began after a crucial access point to Beijing, Lugou Bridge, also known as Marco Polo Bridge, was attacked by Japanese troops on July 7, 1937. (Xinhua)

File photo shows soldiers of the No. 29 Nationalists Corps keeping watch on the Japanese soldiers at Wanping town after the "July 7 Incident" in Beijing. China was the first nation to fight against fascist forces. The struggle started on September 18, 1931, when Japanese troops began their invasion of northeast China. It was intensified when Japan's full-scale invasion began after a crucial access point to Beijing, Lugou Bridge, also known as Marco Polo Bridge, was attacked by Japanese troops on July 7, 1937. (Xinhua)

File photo taken in 1937 shows Lugou Bridge in Beijing. China was the first nation to fight against fascist forces. The struggle started on September 18, 1931, when Japanese troops began their invasion of northeast China. It was intensified when Japan's full-scale invasion began after a crucial access point to Beijing, Lugou Bridge, also known as Marco Polo Bridge, was attacked by Japanese troops on July 7, 1937. (Xinhua)

File photo taken by Japanese military correspondent shows Japanese soldiers during the "July 7 Incident" in Beijing. China was the first nation to fight against fascist forces. The struggle started on September 18, 1931, when Japanese troops began their invasion of northeast China. It was intensified when Japan's full-scale invasion began after a crucial access point to Beijing, Lugou Bridge, also known as Marco Polo Bridge, was attacked by Japanese troops on July 7, 1937. (Xinhua)

File photo taken by Japanese military correspondent shows Japanese soldiers during the "July 7 Incident" in Beijing. China was the first nation to fight against fascist forces. The struggle started on September 18, 1931, when Japanese troops began their invasion of northeast China. It was intensified when Japan's full-scale invasion began after a crucial access point to Beijing, Lugou Bridge, also known as Marco Polo Bridge, was attacked by Japanese troops on July 7, 1937. (Xinhua)

File photo shows Chinese soldiers at Nankou Railway Station in Beijing. China was the first nation to fight against fascist forces. The struggle started on September 18, 1931, when Japanese troops began their invasion of northeast China. It was intensified when Japan's full-scale invasion began after a crucial access point to Beijing, Lugou Bridge, also known as Marco Polo Bridge, was attacked by Japanese troops on July 7, 1937. (Xinhua)