信 (xìn): believe, letter

信 (xìn) is a Chinese character meaning “believe, letter.” Classified as HSK Level 3 (HSK 3.0 Standard, CLEC 2022), it is composed of 亻 (structural) and 言 (structural). It ranks #176 in character frequency (SUBTLEX-CH corpus).

Spoken pronunciation

Definitions

  1. believe, letter

Stroke Order

1
2
3
4
5
6
7
8
9

Practice writing 信 with real-time feedback — trace each stroke in the correct order and build muscle memory in the HanziFeed app.

Words & Compounds

HSK Vocabulary with 信

WordPinyinMeaningHSK
相信verbxiāng xìnto believe3
信息nounxìn xīinformation4
信任verbxìn rènto trust5
信号nounxìn hàosignal4
自信verb/noun/adjectivezì xìnto have confidence in oneself4
信心nounxìn xīnconfidence4
信用卡nounxìn yòng kǎcredit card3
信念nounxìn niànfaith6
短信nounduǎn xìntext message4
信封nounxìn fēngenvelope5
通信verbtōng xìnto correspond (by letter, email etc)6
信赖verbxìn làito trust6
信用nounxìn yòngtrustworthiness5
回信verb/nounhuí xìnto reply4
诚信adjectivechéng xìnhonesty6

Common Compounds

WordPinyinMeaning
难以置信phrasenán yǐ zhì xìn(idiom) hard to believe
信仰verbxìn yǎngto believe in (a religion)
确信verbquè xìnto be convinced
写信verbxiě xìnto write a letter
坚信verbjiān xìnto believe firmly
来信verblái xìnincoming letter
信件nounxìn jiànletter (sent by mail)
信箱nounxìn xiāngmailbox
口信nounkǒu xìnoral message
可信adjectivekě xìntrustworthy
信徒nounxìn túbeliever
迷信verbmí xìnsuperstition
信托verbxìn tuōto entrust
明信片míng xìn piànpostcard
信守verbxìn shǒuto abide by
110
Total compounds
38
As first character
58
As last character
4
As middle character

信 appears in 110 compound words: 38 as the first character, 58 as the last, and 4 in a middle position. Compound statistics computed from SUBTLEX-CH and HSK 3.0 vocabulary data.

Strongest Collocations

Characters that most frequently co-occur with 信 in natural Chinese text, ranked by NPMI (Normalized Pointwise Mutual Information) — a statistical measure of association strength.

仰yǎng
0.65095,050 co-occurrences
息xī
0.608134,446 co-occurrences
徒tú
0.54431,480 co-occurrences
宗zōng
0.48539,550 co-occurrences
浸jìn
0.4675,046 co-occurrences
奉fèng
0.45814,784 co-occurrences
通tōng
0.43560,864 co-occurrences
号hào
0.43443,084 co-occurrences
教jiào
0.42553,316 co-occurrences
相xiāng
0.42371,296 co-occurrences

Idioms & Chengyu (17)

半信半疑bànxìn-bànyíHSK 4+

half-believing, half-doubting; not quite convinced

phrase
背信弃义bèixìnqìyìHSK 5+

to break the faith and disregard righteousness; to act perfidiously; perfidious, treacherous; treachery, perfidy

phrase
电子信箱diànzǐ xìnxiāngHSK 3+

electronic mailbox; e-mailbox; inbox

noun
将信将疑jiāngxìn-jiāngyíHSK 4+

to take with a pinch of salt; to be doubtful; to be not quite convinced

phrase
渺无音信miǎo wú yīn xìnHSK 7+

to receive no news whatsoever about sb

phrase
难以置信nányǐzhìxìnHSK 5+

unbelievable; incredible

phrase
偏听偏信piān tīng piān xìnHSK 7+

selective listening; to hear what one wants to hear

phrase
善男信女shànnánxìnnǚHSK 5+

devotees or followers of Buddhism, later extended to Taoism and other religions

phrase
深信不疑shēnxìnbùyíHSK 4+

to firmly believe without any doubt

phrase
随信附上suí xìn fù shàngHSK 4+

enclosed with (this) letter

phrase
威信扫地wēi xìn sǎo dìHSK 5+

to lose every scrap of reputation

phrase
违信背约wéi xìn bèi yuēHSK 5+

in violation of contract and good faith

phrase

Showing 12 of 17 idioms containing 信.

Example Sentences

AI-Generated

请相信我们的专业能力,这个项目一定会按时完成。

Qǐng xiāngxìn wǒmen de zhuānyè nénglì, zhè gè xiàngmù yídìng huì ànshí wánchéng.

Please believe in our professional capabilities; this project will definitely be completed on time.

百度新闻Feb 2026

联合国:收到伊朗来信 对地区紧张局势深表关切

lián gě guó : shōu dào yī lǎng lái xìn duì dì qū jǐn zhāng jú shì shēn biǎo guān qiē

United Nations: Received a letter from Iran expressing deep concern about regional tensions

百度新闻Feb 2026

“新春走基层”为了不失联的信号

xīn chūn zǒu jī céng wéi le bù shī lián de xìn hào

"New Year to the grassroots" is a signal not to lose contact

百度新闻Feb 2026

2025年收获满满,山东信息职业技术学院向合作单位..

nián shōu huò mǎn mǎn , shān dōng xìn xī zhí yè jì shù xué yuàn xiàng gě zuò shàn wèi . .

2025: A Year of Abundant Harvests Shandong Information Vocational College extends its gratitude to partner institutions...

百度新闻Feb 2026

春节新功能!微信又上新了

chūn jié xīn gōng néng ! wēi xìn yòu shǎng xīn le

New Spring Festival Features! WeChat has rolled out more updates.

百度新闻Feb 2026

不只是相信“相信的力量”——速滑团体追逐夺牌的背后

bù zhī shì xiāng xìn xiāng xìn de lì liáng sù huá tuán tī zhuī zhú duó pái de bēi hòu

Beyond Believing in the Power of Belief: The Story Behind the Speed Skating Team Pursuit's Medal Run

Tatoeba

这封信是玛丽写的吗?

Zhè fēng xìn shì Mǎlì xiě de ma?

Was this letter written by Mary?

Tatoeba

可以帮我寄这封信吗?

Kěyǐ bāng wǒ jì zhè fēng xìn ma?

Would you mind mailing this letter for me?

Tatoeba

我需要写一封信。你有纸吗?

Wǒ xūyào xiě yī fēng xìn. nǐ yǒu zhǐ ma?

I have to write a letter. Do you have some paper?

Tatoeba

我应该回信给他吗?

Wǒ yīnggāi huíxìn gěi tā ma?

Should I reply to his letter?

Character Family

Homophones — Characters pronounced xìn

Frequently Asked Questions

What does 信 (xìn) mean in Chinese?
信 (xìn) primarily means "believe, letter." It is classified as HSK Level 3, making it a beginner-level character. It ranks #176 in character frequency.
How many strokes does 信 have?
信 is written with 9 strokes. The correct stroke order matters for recognition and handwriting speed — practice with the animated guide above to build proper technique.
What is the radical of 信?
The radical associated with 信 is 亻 (person). This radical appears in many characters related to person.
What are the components of 信?
信 is composed of: 亻 (structural), 言 (structural). Its IDS decomposition is ⿰亻言 with a left-right layout. Understanding the components helps with both memorization and recognizing related characters.
What are common words containing 信?
Common words with 信 include: 相信 (xiāng xìn, "to believe"); 信息 (xìn xī, "information"); 信任 (xìn rèn, "to trust"); 信号 (xìn hào, "signal"); 难以置信 (nán yǐ zhì xìn, "(idiom) hard to believe"). There are over 110 compound words containing this character.
What characters sound the same as 信 (xìn)?
Several characters share the pronunciation xìn: 心 (heart, mind), 新 (new), 辛 ((of taste) hot or pungent), 欣 (happy), and 4 more. Context and tones help distinguish between them in speech and writing.
Is 信 the same in simplified and traditional Chinese?
Yes, 信 is written the same way in both simplified and traditional Chinese.

Practice writing 信 with real-time feedback

Trace stroke sequences, hear spoken pronunciation, and build lasting retention with spaced repetition in the HanziFeed app.

Character data sourced from Unihan (Unicode Consortium), SUBTLEX-CH frequency corpus (Cai & Brysbaert, 2010), and Make Me a Hanzi (stroke data). Collocation strength measured via NPMI (Normalized Pointwise Mutual Information). Verified by the HanziFeed linguistics team.

HSK classification follows the HSK 3.0 Standard (Center for Language Education and Cooperation, CLEC, 2022 revision). Idiom data from Wiktionary (CC BY-SA 3.0).

Data last verified: March 2026.