I. Evolution of Communication Technology

1G Era (1980s): Analog signal technology, represented by devices like the 'big brother' mobile phone, which only supported voice calls and was expensive.

2G Era (1990s): The rise of digital technology, supporting SMS and basic data transmission. Mobile phones began to popularize, with brands like Nokia and Motorola becoming wildly popular.

3G Era (2000s): Broadband mobile communication was realized, supporting multimedia such as images and videos. China proposed the TD-SCDMA standard, and smartphones emerged.

4G Era (2010s): High-speed mobile internet became widespread, supporting high-definition video and mobile payments. China built the world's largest 4G network.

5G Era (2020s to present): Ultra-high speed and low latency, supporting the Internet of Things, autonomous driving, etc. China leads the world in the number of 5G base stations and users.

II. Milestones in China's Communication Development

1876: China's first telegraph line was built between Fuzhou and Mawei.

1987: China's first mobile telephone network was launched in Guangdong.

2025: China has built the world's largest 5G network, with over 4.7 million 5G base stations and 1.167 billion users.

III. Global Communication Technology Breakthroughs

1895: Guglielmo Marconi invented the radio telegraph, ushering in radio communication.

1973: Motorola engineer Martin Cooper invented the prototype of the 'big brother' mobile phone.

2025: Global 5G-Advanced (5G-A) networks will be commercially deployed