Feng Chengwen measures the verticality of a wall he built in Jibaoyu village in Yiyuan county, Shandong province, on Aug 10. (Photo: China Daily)

Villagers volunteer to pave a square with stones. (Photo: China Daily)

Feng and other volunteers rest at the construction site. (Photo: China Daily)

Feng (right) hammers stones to make construction material on April 19. (Photo: China Daily)

Feng lays bricks to build a wall with two fellow villagers. (Photo: China Daily)

Feng takes a break while working on a construction site on Aug 10. (Photo: China Daily)