Core Viewpoint - The collaboration between Nanjing and Zhangjiajie has led to significant achievements in agricultural product sales and cultural exchange, highlighting the importance of regional cooperation in enhancing local economies and promoting unique products [1][2]. Group 1: Collaboration Achievements - Over 700 mutual visits and exchanges have occurred between the two cities, with more than 100 cooperation agreements signed across various fields [2]. - Nanjing has established multiple sales points for Zhangjiajie agricultural products, resulting in over 8 million yuan in sales this year alone [2]. - The "Ning Zhang Cooperation" initiative has facilitated the signing of procurement framework agreements between seven Nanjing procurement units and the consumption assistance exhibition center [2]. Group 2: Agricultural and Cultural Promotion - Zhangjiajie is known for its unique agricultural products, including Mei tea, which is rich in flavonoids and has been dubbed the "king of flavonoids" [1]. - The cities are exploring a new model of integrated development between agriculture and tourism, focusing on the construction of a "Mei Tea Theme Park" to promote cultural and experiential tourism [3].