Deep Expression AI

Deep Expression AI is a free intelligent writing assistant tool co-incubated by Tsinghua University NLP Lab and Zhiyuan Research Institute. Its core features include semantic word suggestions and semantic sentence search, aimed at solving vocabulary scarcity and expression repetition in Chinese writing.

Main features include semantic word suggestions (enter a description to find words), semantic sentence search (enter a topic to find sentences), vocabulary lookup (definitions, near synonyms and antonyms), and a vast multilingual material library covering a wide range of styles, with support for Chinese and English input and bilingual results.

The basic features are completely free, and you can use them without registering or logging in. Some advanced services may become paid in the future, but the core word/phrase search features are currently free to try.

Suitable for students, writers, copywriters, content creators, business professionals, and language learners—anyone who wants to improve the precision and style of Chinese expression.

On the website or WeChat Mini Program, enter a fuzzy semantic description (for example, 'a lot of things'). The system uses semantic analysis to recommend fitting words, idioms or technical terms, and you can filter by part of speech or category.

The corpus is supported by Tsinghua University NLP Laboratory and Zhiyuan Institute, covering tens of millions of categorized texts across styles such as academic, fiction, film and TV, classical poetry, and internet buzzwords. It is authoritative and continuously updated.