| 1 | 系统 | 系統 | xì tǒng | xi4 tong3 | system; Classifiers: 个 | | |
| 2 | 体系 | 體系 | tǐ xì | ti3 xi4 | system; setup; Classifiers: 个 | | |
| 3 | 联系 | 聯係 | lián xì | lian2 xi4 | variant of 聯繫 |联系 , connection; contact; relation; in touch with; to integrate; to link; to touch; to link; to connect; connection; contact; relation; to get in touch with; to integrate; to link; to touch; variant of 联系 | | |
| 4 | 一系列 | 一系列 | yī xì liè | yi1 xi4 lie4 | a series of; a string of | | |
| 5 | 系 | 係 | xì | xi4 | to connect; to arrest; to worry; system; department; faculty; to connect; to relate to; to tie up; to bind; to be (literary) | | |
| 6 | 生产关系 | 生產關係 | shēng chǎn guān xì | sheng1 chan3 guan1 xi4 | relations between levels of production; socio-economic relations | | |
| 7 | 系数 | 係數 | xì shù | xi4 shu4 | coefficient; factor; modulus; ratio | | |
| 8 | 社会关系 | 社會關係 | shè huì guān xì | she4 hui4 guan1 xi4 | social relation | | |
| 9 | 星系 | 星系 | xīng xì | xing1 xi4 | see 恒星系 | | |
| 10 | 系列 | 系列 | xì liè | xi4 lie4 | series; set | | |
| 11 | 太阳系 | 太陽系 | tài yáng xì | tai4 yang2 xi4 | solar system | | |
| 12 | 生态系统 | 生態系統 | shēng tài xì tǒng | sheng1 tai4 xi4 tong3 | ecosystem | | |
| 13 | 神经系统 | 神經系統 | shén jīng xì tǒng | shen2 jing1 xi4 tong3 | nervous system | | |
| 14 | 根系 | 根系 | gēn xì | gen1 xi4 | root system | | |
| 15 | 思想体系 | 思想體系 | sī xiǎng tǐ xì | si1 xiang3 ti3 xi4 | system of thought; ideology | | |
| 16 | 坐标系 | 座標系 | zuò biāo xì | zuo4 biao1 xi4 | coordinate system (geometry) | | |
| 17 | 子系统 | 子系統 | zǐ xì tǒng | zi3 xi4 tong3 | subsystem | | |
| 18 | 系统性 | 系統性 | xì tǒng xìng | xi4 tong3 xing4 | systematic | | |
| 19 | 银河系 | 銀河系 | yín hé xì | Yin2 he2 xi4 | Milky Way Galaxy; the galaxy (our galaxy) | | |
| 20 | 人际关系 | 人際關係 | rén jì guān xì | ren2 ji4 guan1 xi4 | interpersonal relationship | | |
| 21 | 母系 | 母系 | mǔ xì | mu3 xi4 | maternal; matriarchal | | |
| 22 | 水系 | 水系 | shuǐ xì | shui3 xi4 | drainage system | | |
| 23 | 社会信用体系 | 社會信用體系 | shè huì xìn yòng tǐ xì | she4 hui4 xin4 yong4 ti3 xi4 | social credit system, a system that incentivizes individuals and businesses by creating consequences for good and bad behavior | | |
| 24 | 国家医疗服务体系 | 國家醫療服務體系 | guó jiā yī liáo fú wù tǐ xì | Guo2 jia1 Yi1 liao2 Fu2 wu4 Ti3 xi4 | National Health Service (UK) | | |
| 25 | 边缘系统 | 邊緣系統 | biān yuán xì tǒng | bian1 yuan2 xi4 tong3 | limbic system | | |