Core Viewpoint - The recent Shanghai Cooperation Organization summit in Tianjin marks a significant diplomatic event, highlighting the potential rise of second-tier cities in China's international diplomacy [2][9][30]. Group 1: Event Significance - The summit in Tianjin is the largest since the establishment of the Shanghai Cooperation Organization, showcasing the city's growing international profile [2]. - The event is expected to enhance Tianjin's infrastructure and international cooperation opportunities, affirming its status as a key player in China's urban diplomacy [2][3]. Group 2: Outcomes and Benefits - Tianjin emerged as a major beneficiary from the summit, hosting three significant cooperation platforms related to green industry, digital economy, and vocational education [5]. - The city's international trade with Shanghai Cooperation Organization countries reached 53.37 billion RMB in the first seven months of the year, reflecting a year-on-year growth of 5.2% [5]. Group 3: Future Prospects - The recent policy from the Central Committee of the Communist Party of China supports cities to undertake significant foreign affairs activities, indicating a shift towards empowering second-tier cities [25][30]. - Cities like Xi'an, Zhengzhou, and Chengdu may have increased opportunities to host international events due to their regional significance and existing infrastructure [27][30]. Group 4: Urban Development and Strategy - The establishment of the China-Shanghai Cooperation Organization platforms in Tianjin aligns with the city's designation as an important national center, enhancing its strategic importance [8][30]. - The trend of promoting more cities to engage in international diplomacy is expected to alleviate the concentration of functions in mega-cities like Beijing and Shanghai, fostering regional development [30][32].