In an illustration from a 1946 textbook lesson on the importance of hard work and persistence, two country boys carry a bucket of water. They water a peach tree every day, and as it grows from a sapling into a mature tree, they grow into adults.
Source: Liu Yu.  1974. Chuxiao Guoyu 初小國語 [Lower-elementary Mandarin], vols. 1 and 3. Yan’an: Xinhua Shudian; Reprint, Washington, DC: Center for Chinese Research Materials, Association of Research Libraries.