其中
qízhōng · HSK 2
among
其中 = qí (its/that) + zhōng (middle/among) → in the middle of that group
其 means 'its' or 'that one'; 中 means 'middle' or 'within'. Together they literally read as 'within that' — used to single out members from a previously mentioned set, like 'among them' in English.
其 — top 八 + winnowing basket 其 (originally 箕)
Originally a pictograph of a bamboo winnowing basket, now written 箕 with the bamboo radical added on top. The original form 其 was borrowed phonetically to write the pronoun and particle meaning 'his/her/its' or 'that.' This loan use became dominant, so a new character 箕 was created for the basket meaning.
中 — vertical stroke 丨 through enclosure 口
Pictograph of a banner or pole piercing the center of a target or territory, depicting the idea of 'middle' or 'center'. The horizontal frame represents boundaries, and the vertical line marks the central axis. The meaning extended from spatial center to 'middle, central, China' (中国, the Middle Kingdom).