Zi Collection, Page Position: Lower Radical: Open Box (kǎn) Kangxi stroke count: 5 Page number: 135, item 10 In the Tang Rhyme (Tángyùn) and the Jiyun (Jíyùn) and the Yunhui (Yùnhuì), pronounced yì. It means to be low or depressed. In the Divine Marvels (Shényì Jīng) by Dongfang Shuo: "In the great desolate stone lake, for a thousand li there are neither convex nor concave parts, completely flat without highs or lows." In the Ode to Green Moss (Qīngtái Fù) by Jiang Yan: "Alas for the treacherous depressions, where only flowing water rushes past." In the Records on Cinnabar and Lead (Dānqiān Lù) by Yang Shen: "A hollow in the earth is called 凹, a rise in the earth is called 凸. An ancient pictographic character." Also, in the Jiyun (Jíyùn), pronounced yāo. It means hollow, depressed.