The Chinese Standard Movement, also commonly known as the "Tongji" (Chinese: 统机, "unified") movement, is a mechanical watch movement that was developed in the People's Republic of China during its fourth Five-Year Plan in the 1970s. It was designed by engineers from several early Chinese watch factories as part of a Ministry of Light Industry initiative to consolidate the industry, and with a few exceptions it became mandatory for all factories to discontinue the production of their own movements and to mass-produce the standard movement. Because of this, the production of the standard movement defines an entire era in the history of Chinese watchmaking. Once the most commonly produced mechanical/automatic watch movements in China, the numbers produced and their quality (at least for a maj