16. Zhengzhou No.3 Factory has 16 anti-counterfeiting code on a 4-square multi-line plate, which is unique and will not be the same. Zhengzhou, referred to as "Zheng" for short, was called "in heaven and earth" in history, called Shangdu in ancient times, and now called Greentown. Henan Province governs prefecture-level cities, provincial capitals and megacities to promote the rise of central China. The 13th Five-Year Plan explicitly supports the construction of a national central city.