长三角增速第一，为什么是它？

Economic Performance of the Yangtze River Delta - The economic total of the Yangtze River Delta region exceeded 16 trillion yuan in the first half of 2025, accounting for 24.8% of the national economy [1] - Nine cities in the region achieved a GDP exceeding 500 billion yuan, with Shanghai leading at 26,222.15 billion yuan, followed by Suzhou and Hangzhou at 13,002.35 billion yuan and 11,303 billion yuan respectively [1] - 34 cities in the Yangtze River Delta matched or exceeded the national GDP growth rate of 5.3%, with 17 cities achieving growth rates of 6% or higher [1] Economic Growth of Zhoushan - Zhoushan's economy grew by 6.9% in the first half of the year, the highest in the Yangtze River Delta, surpassing the growth of neighboring cities [2] - The city's industrial output value increased by 11.5%, significantly above the provincial average of 3.9%, with key industries such as power production and shipbuilding showing substantial growth [3] - Zhoushan's marine economy accounted for 69.72% of its GDP, making it one of the cities with the highest marine economic contribution in the country [3] Industrial Development in Zhoushan - The industrial output value of Zhoushan's major industries, including power supply, shipbuilding, and petrochemicals, contributed significantly to the city's overall industrial growth [3] - The green petrochemical and new materials industry is identified as the largest industrial sector in Zhoushan, contributing 61% to the city's industrial output [3] National Economic Trends - The report highlights that the number of "billion-county" economies in China has reached 63, with a total GDP exceeding 10 trillion yuan, representing 7.99% of the national economy [12] - The county-level economic growth is led by cities like Kunshan and Jiangyin, with significant contributions from other regions as well [17]