In 1937, the father of Li Shougen, a cowherd boy by the Wen River, was killed by Japanese soldiers and his body was thrown into the Wen River.
He picked up the copper cowbell left by his father and became an underground correspondent in the Central Shandong Military Region.
In eight years, he traveled through 72 valleys in central Shandong, wore out 17 pairs of cloth shoes, sent more than 300 top-secret messages, and escorted more than 100 cadres and wounded people.
He had seen the blood of Daqingshan and guarded Guding with the soldiers of Daigu Company.
He watched with his own eyes as 30 soldiers fired their last bullet at Taohua Ridge and jumped off the cliff hand in hand.
He watched with his own eyes as an ordinary rural woman had hot porridge poured all over her body, and she did not tell the whereabouts of the injured until she died.
In 1945, Japan surrendered. He took off his military uniform and returned to his hometown, waiting for the organization's call.
But this wait is a lifetime.
Many people said he was a hero, but he shook his head:
"I'm not a hero, I'm just a messenger.
But I know that every letter is a lifeline for millions of people.
And peace is the last wordless letter I received. "