During the Song dynasty (960-1276), the cosmological writings of the Neo-Confucianists, escpecially the Cheng-Zhu school, gave ganying its "perfect expression" (Le Blanc 1985: 9).
The Jishanji 霽山集 "Clear Mountain Collection" by the Song author Lin Jingxi 林景熙 (1242-1310) praised psychological resonance.