Introduction by Zhang Side: The statue of Zhang Side was collected by coal miners during the Cultural Revolution. It was a work derived from the upsurge of people studying Chairman Mao's "Lao San Pian" and the deeds of Lei Feng, Ouyang Hai and other advanced people at that time. It highlights the Chinese People's Liberation Army's spirit of hard work and hardship, as well as its tall image of serving the people wholeheartedly and seeking nothing for anything.