Zhang Qizhen, an art teacher in Picheng, used a paintbrush to enter and exit the Japanese and puppet strongholds.
He hid the sentry code in the cherry blossom pattern of the Japanese army's portrait, painted the city defense mark into the armor of the door god's New Year painting, and used a gap in the azurite paint to hide it from the enemy for eleven years.
In order to stay and take care of his wife who was expecting childbirth, he voluntarily gave up his quota for the northern evacuation and lurked behind enemy lines until liberation. Finally, he ran throughout the county communes with a picture folder on his back, painting all the hidden threads in the spy war into bright colors on the walls of New China.
