The third episode in an ongoing documentary series on the Anti-Japanese War covered the Battle of Pingxingguan, which saw a morale-boosting victory for the Communist army in its fight against Japanese invaders. (Xinhua)

The third episode in an ongoing documentary series on the Anti-Japanese War covered the Battle of Pingxingguan, which saw a morale-boosting victory for the Communist army in its fight against Japanese invaders. (Xinhua)

The third episode in an ongoing documentary series on the Anti-Japanese War covered the Battle of Pingxingguan, which saw a morale-boosting victory for the Communist army in its fight against Japanese invaders. (Xinhua)

The third episode in an ongoing documentary series on the Anti-Japanese War covered the Battle of Pingxingguan, which saw a morale-boosting victory for the Communist army in its fight against Japanese invaders. (Xinhua)

The third episode in an ongoing documentary series on the Anti-Japanese War covered the Battle of Pingxingguan, which saw a morale-boosting victory for the Communist army in its fight against Japanese invaders. (Xinhua)

The third episode in an ongoing documentary series on the Anti-Japanese War covered the Battle of Pingxingguan, which saw a morale-boosting victory for the Communist army in its fight against Japanese invaders. (Xinhua)

The third episode in an ongoing documentary series on the Anti-Japanese War covered the Battle of Pingxingguan, which saw a morale-boosting victory for the Communist army in its fight against Japanese invaders. (Xinhua)

The third episode in an ongoing documentary series on the Anti-Japanese War covered the Battle of Pingxingguan, which saw a morale-boosting victory for the Communist army in its fight against Japanese invaders. (Xinhua)

The third episode in an ongoing documentary series on the Anti-Japanese War covered the Battle of Pingxingguan, which saw a morale-boosting victory for the Communist army in its fight against Japanese invaders. (Xinhua)