With Changzhou in Jiangsu and Yantai in Shandong joining hands to become cities with a GDP of trillions, the number of trillions of cities in China has increased to 26. Changzhou and Yantai join hands to advance. As the least populous city among the "trillion dollar clubs," Changzhou's "winning strategy" and "unique skill" lie in the new energy industry. Changzhou, known as the "capital of new energy", has a new energy industry output value of about 750 billion yuan in 2023, accounting for nearly one-third of the city's industrial output value. The production of new energy vehicles is nearly 680000, and the investment heat is the highest in the country. Changzhou has a solid family background and the most complete industrial system among similar cities in China. There are 37 out of 41 major categories of national industry and 605 out of 666 subcategories. Changzhou's promotion has also made Jiangsu the first province in China to have a city worth 5 trillion yuan. Yantai has become the third trillion level city in Shandong. At the beginning of the new year, the "Gravity One" (Yaoyi) carrier rocket was launched into the sea off Yantai, Shandong, breaking multiple records and also breaking people's previous understanding that Yantai is only famous for its seafood and fruits. As a strong industrial city, Yantai has focused on the "9+N" manufacturing industry cluster in recent years, implementing a "chain length system" for 16 key industrial chains. It plans to form an industrial cluster array of 300 billion and 200 billion each, and 4 clusters of 100 billion within 3 years, vigorously developing green petrochemical, marine equipment, automotive industry, biomedicine and other fields. "The GDP of these two cities has exceeded one trillion yuan, stemming from the practice of the new development concept and firmly grasping the high-tech industry as the engine of innovation driven development, giving birth to new industries, new models, and new driving forces." Zhang Jianping, Deputy Director of the Academic Committee of the Research Institute of the Ministry of Commerce, stated to China Singapore Finance and Economics. Looking back at the development trajectory of China's trillion yuan city, Shanghai's GDP exceeded one trillion yuan in 2006, marking the beginning of the trillion yuan era of urban economic scale. Now, it is launching an attack on the first city in China with a GDP of 5 trillion yuan. In 2008, Beijing's GDP exceeded one trillion yuan for the first time, and the latest announced GDP for 2023 has reached about 4.4 trillion yuan. In 2010, Guangzhou became the first provincial capital city with an economic output exceeding one trillion yuan, and in 2023, it joined the "3 trillion yuan club". In 2011, the "Trillion Club" welcomed four new members in one breath: Shenzhen, Tianjin, Suzhou, and Chongqing; In 2014, both Wuhan and Chengdu were shortlisted; In 2015, Hangzhou's GDP exceeded one trillion yuan, and the high-tech industry lifted the beam of industrial structural reform. For the next three years, two cities will join hands to advance each year, namely Nanjing and Qingdao in 2016, Wuxi and Changsha in 2017, and Ningbo and Zhengzhou in 2018. After Foshan broke through alone in 2019, Fuzhou, Quanzhou, Nantong, Hefei, Xi'an, and Jinan achieved common upgrading in 2020, and China's GDP exceeded the 100 trillion yuan mark in the same year. In 2021, Dongguan, a major foreign trade city, was shortlisted to seize its position; After a one-year gap, Changzhou and Yantai became the latest faces of 2023. Following closely behind, a number of waist cities such as Tangshan, Xuzhou, Dalian, and Wenzhou have become the "reserve forces" of trillion dollar cities. What does 26 trillion dollar cities mean for the city's vitality