| 1 | 四 | 四 | sì | si4 | four; 4 | | |
| 2 | 四十 | 四十 | sì shí | si4 shi2 | the four seasons, namely: spring 春 , summer 夏 , autumn 秋 and winter 冬 ; forty; 40 | | |
| 3 | 第四 | 第四 | dì sì | di4 si4 | fourth; number four | | |
| 4 | 四人帮 | 四人幫 | sì rén bāng | si4 ren2 bang1 | Gang of Four: Jiang Qing 江青 , Zhang Chunqiao 張春橋 , Yao Wenyuan 姚文元 , Wang Hongwen 王洪文 , who served as scapegoats for the excesses of the cultural revolution | | |
| 5 | 四川 | 四川 | sì chuān | Si4 chuan1 | Sichuan province (Szechuan) in southwest China, abbr. 川 or 蜀 , capital Chengdu 成都 | | |
| 6 | 四周 | 四周 | sì zhōu | si4 zhou1 | all around | | |
| 7 | 十四 | 十四 | shí sì | shi2 si4 | fourteen; 14 | | |
| 8 | 四边形 | 四邊形 | sì biān xíng | si4 bian1 xing2 | quadrilateral | | |
| 9 | 二十四 | 二十四 | èr shí sì | er4 shi2 si4 | twenty four; 24 | | |
| 10 | 四月 | 四月 | sì yuè | Si4 yue4 | April; fourth month (of the lunar year) | | |
| 11 | 四化 | 四化 | sì huà | si4 hua4 | abbr. for 四个现代化 , Deng Xiaoping's four modernizations | | |
| 12 | 四肢 | 四肢 | sì zhī | si4 zhi1 | the four limbs of the body | | |
| 13 | 新四军 | 新四軍 | xīn sì jūn | Xin1 si4 jun1 | New Fourth army of Republic of China, set up in 1937 and controlled by the communists | | |
| 14 | 四个现代化 | 四個現代化 | sì ge xiàn dài huà | si4 ge5 xian4 dai4 hua4 | Deng Xiaoping's four modernizations practiced from the 1980s (possibly planned together with Zhou Enlai), namely: modernization of industry, agriculture, national defense and science and technology; abbr. to 四化 | | |
| 15 | 四项基本原则 | 四項基本原則 | sì xiàng jī běn yuán zé | Si4 xiang4 Ji1 ben3 Yuan2 ze2 | the Four Cardinal Principles enunciated by Deng Xiaoping 邓小平 in 1979: to uphold the socialist road, the dictatorship of the proletariat, the leadership of the CCP, and Maoism and Marxism-Leninism | | |
| 16 | 四处 | 四處 | sì chù | si4 chu4 | all over the place; everywhere and all directions | | |
| 17 | 五四 | 五四 | wǔ sì | wu3 si4 | fourth of May, cf 五四运动 , national renewal movement that started with 4th May 1919 protest against the Treaty of Versailles | | |
| 18 | 四面 | 四面 | sì miàn | si4 mian4 | all sides | | |
| 19 | 四千 | 四千 | sì qiān | si4 qian1 | four thousand; 4000 | | |
| 20 | 四方 | 四方 | sì fāng | si4 fang1 | four-way; four-sided; in all directions; everywhere | | |
| 21 | 一九四九 | 一九四九 | yī jiǔ sì jiǔ | yi1 jiu3 si4 jiu3 | 1949; year of the communist victory in China, the foundation of the PRC and of ROC in Taiwan | | |
| 22 | 四面八方 | 四面八方 | sì miàn bā fāng | si4 mian4 ba1 fang1 | in all directions; all around; far and near | | |
| 23 | 四季 | 四季 | sì jì | si4 ji4 | four seasons, namely: spring 春 , summer 夏 , autumn 秋 and winter 冬 | | |
| 24 | 四大 | 四大 | sì dà | si4 da4 | the four elements: earth, water, fire, and wind (Buddhism); the four freedoms: speaking out freely, airing views fully, holding great debates, and writing big-character posters, 大鸣大放 (PRC) | | |
| 25 | 一年四季 | 一年四季 | yī nián sì jì | yi1 nian2 si4 ji4 | all year round | | |