Guangzhou is one of the largest cities in China and has been a first-tier city for a long time. However, there are several reasons why Guangzhou has maintained its status as a first-tier city for such a long time.

Firstly, Guangzhou has a very strong economic foundation. With the development of China's reform and opening up, Guangzhou has gradually become an important international trade city. The port, transportation and logistics industry have become the pillar industries of the city, and the manufacturing industry has also been rapidly developing. Guangzhou's GDP has long been among the top cities in China, and its economic strength is second to none.

Secondly, Guangzhou has a convenient transportation network. The expressway, metro and airport are all convenient transportation means. It is convenient for people to travel both domestically and internationally. In addition, Guangzhou's transportation system is also very advanced. The subway, bus and other public transportation means are very convenient, which is very convenient for people to travel around the city.

Thirdly, Guangzhou has a complete industrial chain. The clothing, shoe industry and other traditional industries have been well developed, and the high-tech industries such as IT and finance have also been rapidly developed. Guangzhou's complete industrial chain can provide jobs and career development opportunities for a large number of workers and white-collar workers.

Fourthly, Guangzhou has good living conditions. The city has many shopping centers and squares, cinemas and other entertainment facilities are very complete, people can enjoy good entertainment and purchase various goods conveniently. In addition, Guangzhou has a humid subtropical climate with warm winters and cool summers, providing good living conditions for residents.

Finally, Guangzhou's political, cultural and other aspects have also been well developed. The city has a complete political system and good laws and regulations to protect the rights and interests of citizens. In addition, Guangzhou has also established a good cultural environment, providing many cultural activities and entertainment for citizens.

In short, Guangzhou has long been a first-tier city due to its strong economic foundation, convenient transportation network, complete industrial chain, good living conditions and sound political and cultural environment.