Zhongwen is a great tool for anyone learning Chinese. It is a Chinese-English dictionary that can be used as a Chrome extension. With over 100,000 active users worldwide, it is the most popular Chinese popup dictionary available.

One of its main features is the ability to look up more than 100,000 words and expressions while reading Chinese websites just by pointing at the words with your mouse. It also includes links to grammar and usage notes for over 400 keywords, making it a valuable resource for learners of Mandarin Chinese.

Another useful feature is its integration with Skritter, allowing users to add new words to their study list with a simple keystroke. Additionally, users can save words to a built-in word list and create Anki flashcards by importing the text file exported from the word list.

Overall, Zhongwen is a quick, easy, and simple-to-use Chinese-English dictionary that provides a range of useful tools for learners of Mandarin Chinese.