Is it allowed to use mobile phones in Tianjin Huiyuan Printing Factory?

Let's take a mobile phone. All printing houses in China are allowed to bring mobile phones, and no printing house is allowed to bring mobile phones, so Tianjin Huiyuan Printing House is allowed to bring mobile phones. Printing is a technology that transfers ink to the surface of paper, fabric, leather and other materials through the processes of plate making, ink application and pressure, and copies the contents of the manuscript in batches. There are many forms of printing, including traditional offset printing, screen printing and digital printing. Hole printing, relief printing, gravure printing and lithography are called the four modern printing technologies. The printing factory is a comprehensive organization integrating design, proofing, plate making, printing, binding, packaging and transportation.