[Candy] tips: Recently, the WeChat public account and the official website are under maintenance and cannot be reserved online. After consultation, you can go directly and show your health code and ID card at the door. [Candy] Exhibition highlights: 1. See the building predecessor is Dabei Telegraph Company (founded by Danes), neoclassical style. (Figure 1) Founder sculpture (Figure 7) Old-fashioned elevator inside (Figure 9) 2. Understanding the earliest telegraph machine in the history of telecommunications development Morse (Figure 2) The earliest mobile phone produced in Shanghai (Figure 3) The first generation of mobile phones in the world Motorola (Figure 4) The earliest displayless beeper (BB) in Shanghai (Figure 5) Shanghai's earliest telephone communication cable was the European access submarine cable (Figure 8)