The primary editor for the dictionary: Wei Jiangong. The Xinhua Zidian in simplified Chinese called 新华字典, which means the "New China Dictionary" is a Chinese language dictionary published by the Commercial Press. It is the best-selling Chinese dictionary and the world's most popular reference work. The dictionary, first published in 1957, has sold over 400 million copies. This pocket-sized dictionary of Chinese characters uses Simplified Chinese characters and pinyin romanization. The most recent Xinhua Zidian edition (the 10th) contains 3,500 compounds and includes over 11,200 logograms, including Traditional Chinese characters and Variant Chinese characters. Bopomofo is used as a supplement alongside Pinyin.