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More than 70 years ago, when he was a teenager from a poor peasant family, he met the People's Liberation Army and the Communist Party for the first time at home.
Since then, the seeds of faith have sprouted in his heart.
After his retirement, he handwritten more than 1 million words of notes on the study of party history, more than 40 books, stacked up more than 1 meter high.
Since 2005, he has volunteered to preach more than 200 lectures on party history in factories, enterprises, rural areas, schools and other places for free, which has been 16 years.
People affectionately call him "Grandpa of Party History".
The children who grew up listening to his stories are now the people who tell his stories.
He is Wang Minglin, an 85-year-old retired veteran party member of Shenjiaying Community in Huangshi City, Hubei Province.
Reporter: Yu Guoqing Pan Zhiwei
Reporter: Chen Yongliang
Editor: Ji Xiaozhuang
Produced by the Audio and Video Department of Xinhua News Agency