它 hides a snake. The oracle-bone and bronze forms of 它 are a clear pictograph of a serpent: a wedge-shaped head above a long, curving body. 它 was in fact the original character for "snake," and that meaning was later given its own dedicated graph by adding the insect-and-reptile radical 虫: 蛇 shé (snake) is simply 它 with 虫 attached. The modern shape, analyzed as 它 = 宀 + 匕, no longer looks like a snake; the top, which can resemble the "roof" radical 宀 (mián), and the bottom 匕 are the worn-down remnants of the coiled body. The radical assignment to 宀 is a convenience of the dictionary, not a clue to the meaning.

Once the snake sense moved to 蛇, the older graph 它 was freed up and put to grammatical work. In classical and early texts 它 (also written 他 in this period, the two being closely tied) carried the meaning "other, another," referring to a thing or party apart from the one in focus. This is the same "other" layer that runs through 他, its near-twin: for much of literary history 它 and 他 overlapped, both able to mean "other" and to serve as a generalized third person without regard to whether the referent was human.

The clean modern division , 他 for human males and the default, 她 for human females, 它 for non-humans , is a twentieth-century settlement, not an ancient one. When the May Fourth reformers fixed 她 (she) into the script around 1917, 它 was stabilized alongside it as the pronoun for things, objects, and animals. The snake had become "it."

它 is the third member of a triad that exists only on paper. 他 (he), 她 (she), and 它 (it) are completely homophonous: all three are pronounced tā, first tone. The distinction lives entirely in the written radical , 亻 (person) for 他, 女 (woman) for 她, and the snake-derived body for 它. In speech there is no it-versus-he-versus-she; "tā" alone tells a listener nothing about the referent's gender or even its humanity. This is a feature almost unique among major world languages: a third-person gender-and-animacy system encoded in the script but entirely absent from the sound system.

它 took its modern place when the triad was rationalized in the 1910s and 1920s. The poet 刘半农 Liú Bànnóng coined 她 (she) around 1917 to meet the demands of translating Western literature, replacing the 亻 of 他 with 女. In the same wave of script modernization, 它 was assigned the non-human slot, so that objects and animals could be referred to with a pronoun distinct in writing from human he and she. The triad is therefore a deliberate twentieth-century design laid over a much older, looser system in which 他 and 它 had simply meant "the other one."

Here is the surprise for English speakers: Chinese uses 它 far less than English uses "it." English requires an explicit subject, so "it" appears constantly , "It is raining," "I bought a book and read it." Chinese does neither. Weather and ambient statements take no dummy subject at all (下雨了 , "raining," with nothing for "it"), and a known object is usually just dropped once established (我买了一本书，看完了 , "I bought a book, finished reading," no pronoun needed). Overusing 它 the way one uses English "it" is one of the clearest learner tells.

When 它 does appear, it is most natural as a concrete object that needs to be picked out, especially after a verb: 我很喜欢这只猫，每天都喂它 (I love this cat, I feed it every day). It also serves when a thing is briefly personified or foregrounded as a topic. But as a subject 它 is comparatively rare, and as a dummy or expletive subject (English "it" in "it seems," "it is important") it is simply wrong , those use other constructions entirely. The plural 它们 tāmen (they, for things) follows the same logic: useful when needed, but easy to overuse.

The hook for 它 is the snake coiled inside it. The character was once a picture of a serpent, and that snake still lives, visibly, in 蛇 shé , 它 with the reptile radical 虫 added back. When the pronoun job came along, the snake slithered out of 它 and into 蛇, leaving the old shell empty and ready to mean, first, "the other one," and then simply "it." A thing without gender, without a face: the leftover graph after the living creature moved next door.

For use, remember that 它 is the quiet member of the 他/她/它 triad, and quiet in a second sense too: Chinese reaches for it far less than English reaches for "it." There is no "it" in 下雨了, no "it" for the book you just put down. Save 它 for a concrete thing you genuinely need to point at , the cat you feed, the flowers you water , and let omission do the rest. All three of the triad sound the same; only the radical, and the long-departed snake, tells them apart on the page.